Alzheimer's & Cognition

Warning letters to primary care physicians (PCPs) regarding overprescription of quetiapine were helpful in reducing overprescribing of this agent, new research suggested.

Investigators analyzed data from an earlier trial that compared prescribing patterns in 5055 PCPs who receive a placebo letter or three warning letters informing them that their prescribing of quetiapine was high and under review by Medicare. Patients in question all had dementia and were either living in nursing homes or in the community.

The intervention reduced quetiapine use among all patients with dementia, with no detectable adverse effects on cognitive function, behavioral symptoms, depression, metabolic diagnoses, hospitalization, or death.

“This study found that overprescribing warning letters to PCPs safely reduced quetiapine prescribing to their patients with dementia,” wrote investigators led by Adam Sacarny, PhD, of the Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York. 

“This intervention and other[s] like it may be useful for future efforts to promote guideline-concordant care,” they added.

The study was published online in JAMA Network Open.
 

Off-Label Prescribing Common

The off-label use of antipsychotics in patients with dementia is fairly common, the investigators noted, affecting roughly one in seven nursing home residents and a similar number of community-dwelling older adults with dementia.

The agents are often prescribed to treat behavioral symptoms associated with dementia, including agitation and aggression. Although some evidence supports this use, antipsychotics in dementia patients can also cause an increased risk for weight gain, cognitive decline, falls and other injuries, cerebrovascular events, and mortality.

While some professional societies have called for “judicious use of antipsychotics in dementia care,” there is little evidence that reducing antipsychotic use in people with dementia might result in a benefit, investigators wrote.

The researchers analyzed data from a previous trial that focused on quetiapine, which is the most prescribed antipsychotic in the United States and is frequently used for patients with dementia.

In the original study, 2528 PCPs received a placebo letter and 2527 received three warning letters sent by the Centers for Medicare & Medicaid Services (CMS), which identified the highest-volume PCP prescribers of quetiapine.

The warning letters stated that the recipient’s quetiapine prescribing was high relative to their peers and was under review by Medicare. The placebo letter clarified an unrelated regulation. 

The current secondary analysis followed the providers and a cohort of their patients from their first receipt of the letters in 2015 through April 2017. The current evaluation analyzes patients’ outcomes through December 2018, utilizing Medicare fee-for-service claims, Minimum Data Set nursing home assessment, and Medicare enrollment data.
 

Low-Cost, Effective Intervention

While the original study focused on total quetiapine prescribing by study PCPs, the current analysis focused on patients’ total quetiapine use per 90-day period. Additional secondary outcomes included measures of cognitive function and behavioral symptoms, indicators of depression, metabolic diagnoses, indicators of use of hospital and healthcare services, and death.

PCPs in the study had a total of 84,881 patients with dementia living in nursing homes and 261,288 living in the community. At baseline, there were 92,874 patients (mean age, 82 years; 69% female).

The warning letters were associated with reduced quetiapine use among both nursing home patients and community-dwelling patients (adjusted difference, –0.7 days; P = .02 and adjusted difference, −1.5 days; P < .001, respectively).

Among nursing home patients, there were no statistically significant adverse changes in cognitive of behavioral health measures that coincided with reduction in quetiapine use.

Although a higher percentage of treatment vs control patients reported weight loss, the difference was not significant, and rates of metabolic diagnoses were similar in both groups. There were also no significant differences between the groups in emergency department use, inpatient hospital admission, or use of restraints.

Results were similar for patients living in the community.

Additionally, no adverse effects on more severe health endpoints, including rates of hospital use or entry to nursing facilities, were detected. Importantly, the risk for death was statistically significantly lower for patients whose PCPs had received warning letters vs control patients (P = .04).

The analysis “provides evidence that a low-cost letter intervention informed by behavioral science can reduce prescribing of quetiapine to patients with dementia in nursing home and community settings,” the authors wrote.

Researchers did not directly observe the administration of the medication but instead used prescription drug fills as a proxy. Moreover, they could not observe results for patients enrolled in Medicare Advantage, and claims-based and assessment-based outcomes might have been subject to measurement errors and under-ascertainment of diagnoses.

The authors received support from the National Institute on Aging. They reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Warning letters to primary care physicians (PCPs) regarding overprescription of quetiapine were helpful in reducing overprescribing of this agent, new research suggested.

Investigators analyzed data from an earlier trial that compared prescribing patterns in 5055 PCPs who receive a placebo letter or three warning letters informing them that their prescribing of quetiapine was high and under review by Medicare. Patients in question all had dementia and were either living in nursing homes or in the community.

The intervention reduced quetiapine use among all patients with dementia, with no detectable adverse effects on cognitive function, behavioral symptoms, depression, metabolic diagnoses, hospitalization, or death.

“This study found that overprescribing warning letters to PCPs safely reduced quetiapine prescribing to their patients with dementia,” wrote investigators led by Adam Sacarny, PhD, of the Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York. 

“This intervention and other[s] like it may be useful for future efforts to promote guideline-concordant care,” they added.

The study was published online in JAMA Network Open.
 

Off-Label Prescribing Common

The off-label use of antipsychotics in patients with dementia is fairly common, the investigators noted, affecting roughly one in seven nursing home residents and a similar number of community-dwelling older adults with dementia.

The agents are often prescribed to treat behavioral symptoms associated with dementia, including agitation and aggression. Although some evidence supports this use, antipsychotics in dementia patients can also cause an increased risk for weight gain, cognitive decline, falls and other injuries, cerebrovascular events, and mortality.

While some professional societies have called for “judicious use of antipsychotics in dementia care,” there is little evidence that reducing antipsychotic use in people with dementia might result in a benefit, investigators wrote.

The researchers analyzed data from a previous trial that focused on quetiapine, which is the most prescribed antipsychotic in the United States and is frequently used for patients with dementia.

In the original study, 2528 PCPs received a placebo letter and 2527 received three warning letters sent by the Centers for Medicare & Medicaid Services (CMS), which identified the highest-volume PCP prescribers of quetiapine.

The warning letters stated that the recipient’s quetiapine prescribing was high relative to their peers and was under review by Medicare. The placebo letter clarified an unrelated regulation. 

The current secondary analysis followed the providers and a cohort of their patients from their first receipt of the letters in 2015 through April 2017. The current evaluation analyzes patients’ outcomes through December 2018, utilizing Medicare fee-for-service claims, Minimum Data Set nursing home assessment, and Medicare enrollment data.
 

Low-Cost, Effective Intervention

While the original study focused on total quetiapine prescribing by study PCPs, the current analysis focused on patients’ total quetiapine use per 90-day period. Additional secondary outcomes included measures of cognitive function and behavioral symptoms, indicators of depression, metabolic diagnoses, indicators of use of hospital and healthcare services, and death.

PCPs in the study had a total of 84,881 patients with dementia living in nursing homes and 261,288 living in the community. At baseline, there were 92,874 patients (mean age, 82 years; 69% female).

The warning letters were associated with reduced quetiapine use among both nursing home patients and community-dwelling patients (adjusted difference, –0.7 days; P = .02 and adjusted difference, −1.5 days; P < .001, respectively).

Among nursing home patients, there were no statistically significant adverse changes in cognitive of behavioral health measures that coincided with reduction in quetiapine use.

Although a higher percentage of treatment vs control patients reported weight loss, the difference was not significant, and rates of metabolic diagnoses were similar in both groups. There were also no significant differences between the groups in emergency department use, inpatient hospital admission, or use of restraints.

Results were similar for patients living in the community.

Additionally, no adverse effects on more severe health endpoints, including rates of hospital use or entry to nursing facilities, were detected. Importantly, the risk for death was statistically significantly lower for patients whose PCPs had received warning letters vs control patients (P = .04).

The analysis “provides evidence that a low-cost letter intervention informed by behavioral science can reduce prescribing of quetiapine to patients with dementia in nursing home and community settings,” the authors wrote.

Researchers did not directly observe the administration of the medication but instead used prescription drug fills as a proxy. Moreover, they could not observe results for patients enrolled in Medicare Advantage, and claims-based and assessment-based outcomes might have been subject to measurement errors and under-ascertainment of diagnoses.

The authors received support from the National Institute on Aging. They reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Warning letters to primary care physicians (PCPs) regarding overprescription of quetiapine were helpful in reducing overprescribing of this agent, new research suggested.

Investigators analyzed data from an earlier trial that compared prescribing patterns in 5055 PCPs who receive a placebo letter or three warning letters informing them that their prescribing of quetiapine was high and under review by Medicare. Patients in question all had dementia and were either living in nursing homes or in the community.

The intervention reduced quetiapine use among all patients with dementia, with no detectable adverse effects on cognitive function, behavioral symptoms, depression, metabolic diagnoses, hospitalization, or death.

“This study found that overprescribing warning letters to PCPs safely reduced quetiapine prescribing to their patients with dementia,” wrote investigators led by Adam Sacarny, PhD, of the Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York. 

“This intervention and other[s] like it may be useful for future efforts to promote guideline-concordant care,” they added.

The study was published online in JAMA Network Open.
 

Off-Label Prescribing Common

The off-label use of antipsychotics in patients with dementia is fairly common, the investigators noted, affecting roughly one in seven nursing home residents and a similar number of community-dwelling older adults with dementia.

The agents are often prescribed to treat behavioral symptoms associated with dementia, including agitation and aggression. Although some evidence supports this use, antipsychotics in dementia patients can also cause an increased risk for weight gain, cognitive decline, falls and other injuries, cerebrovascular events, and mortality.

While some professional societies have called for “judicious use of antipsychotics in dementia care,” there is little evidence that reducing antipsychotic use in people with dementia might result in a benefit, investigators wrote.

The researchers analyzed data from a previous trial that focused on quetiapine, which is the most prescribed antipsychotic in the United States and is frequently used for patients with dementia.

In the original study, 2528 PCPs received a placebo letter and 2527 received three warning letters sent by the Centers for Medicare & Medicaid Services (CMS), which identified the highest-volume PCP prescribers of quetiapine.

The warning letters stated that the recipient’s quetiapine prescribing was high relative to their peers and was under review by Medicare. The placebo letter clarified an unrelated regulation. 

The current secondary analysis followed the providers and a cohort of their patients from their first receipt of the letters in 2015 through April 2017. The current evaluation analyzes patients’ outcomes through December 2018, utilizing Medicare fee-for-service claims, Minimum Data Set nursing home assessment, and Medicare enrollment data.
 

Low-Cost, Effective Intervention

While the original study focused on total quetiapine prescribing by study PCPs, the current analysis focused on patients’ total quetiapine use per 90-day period. Additional secondary outcomes included measures of cognitive function and behavioral symptoms, indicators of depression, metabolic diagnoses, indicators of use of hospital and healthcare services, and death.

PCPs in the study had a total of 84,881 patients with dementia living in nursing homes and 261,288 living in the community. At baseline, there were 92,874 patients (mean age, 82 years; 69% female).

The warning letters were associated with reduced quetiapine use among both nursing home patients and community-dwelling patients (adjusted difference, –0.7 days; P = .02 and adjusted difference, −1.5 days; P < .001, respectively).

Among nursing home patients, there were no statistically significant adverse changes in cognitive of behavioral health measures that coincided with reduction in quetiapine use.

Although a higher percentage of treatment vs control patients reported weight loss, the difference was not significant, and rates of metabolic diagnoses were similar in both groups. There were also no significant differences between the groups in emergency department use, inpatient hospital admission, or use of restraints.

Results were similar for patients living in the community.

Additionally, no adverse effects on more severe health endpoints, including rates of hospital use or entry to nursing facilities, were detected. Importantly, the risk for death was statistically significantly lower for patients whose PCPs had received warning letters vs control patients (P = .04).

The analysis “provides evidence that a low-cost letter intervention informed by behavioral science can reduce prescribing of quetiapine to patients with dementia in nursing home and community settings,” the authors wrote.

Researchers did not directly observe the administration of the medication but instead used prescription drug fills as a proxy. Moreover, they could not observe results for patients enrolled in Medicare Advantage, and claims-based and assessment-based outcomes might have been subject to measurement errors and under-ascertainment of diagnoses.

The authors received support from the National Institute on Aging. They reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Racial discrimination in Black Americans is associated with an increased risk of developing Alzheimer’s disease (AD) in later life, new findings showed.

Researchers found that Black Americans who experience racism in their 40s and 50s are more likely to have increased serum levels of AD biomarkers p-tau181 and neurofilament light (NfL) more than a decade later.

“We know that Black Americans are at an elevated risk of Alzheimer’s disease and other dementias compared to non-Hispanic White Americans, but we don’t fully understand all the factors that contribute to this disproportionate risk,” Michelle Mielke, PhD, co-author and professor of epidemiology and prevention at Wake Forest University School of Medicine, Winston-Salem, North Carolina, said in a press release.

Recent data show AD is twice as prevalent in Black Americans as in Whites, at 18.6% and 10%, respectively. Dr. Mielke said this level of disparity cannot be attributed solely to genetic differences, and evidence suggests that racism and its related stress may play a role.

The findings were published online in Alzheimer’s and Dementia.
 

AD Biomarker Testing

To further explore a possible link between exposure to racism and AD risk, investigators analyzed data from the Family and Community Health Study, a multisite, longitudinal investigation that included more than 800 families in the United States.

Blood samples and information on racial discrimination were collected from 255 middle-aged Black Americans between 2002 and 2005.

Blood samples were tested for serum phosphorylated tau181 (p-Tau181), a marker of AD pathology; NfL, a nonspecific marker of neurodegeneration; and glial fibrillary acidic protein (GFAP), a marker of brain inflammation.

Participants answered questions about racial discrimination, which included whether they have been subjected to disrespectful treatment including racial slurs, harassment from law enforcement, or if they had ever been excluded from social activities because of their race.

The sample included 212 females and 43 males with a mean age of 46. Most participants (70%) lived in urban areas.
 

Stress-Related?

Investigators found no correlation between racial discrimination and increased levels of AD blood biomarkers in 2008 when participants were a mean age of 46 years. However, 11 years later, when participants were roughly 57 years old, investigators found experiencing racism in middle age was significantly correlated with higher levels of both p-Tau181 (r = 0.158; P ≤ .012) and NfL (r = 0.143; P ≤ .023). There was no significant association between reported discrimination and GFAP.

“These findings support the hypothesis that unique life stressors encountered by Black Americans in midlife become biologically embedded and contribute to AD pathology and neurodegeneration later in life,” the authors wrote.

Investigators speculated based on previous research that the stress related to discrimination may be associated with reductions in hippocampal and prefrontal cortex volumes and neurodegeneration in general.

Dr. Mielke also said it’s clear that future studies should focus on racism experienced by Black Americans to further understand their risk for dementia.

“This research can help inform policies and interventions to reduce racial disparities and reduce dementia risk,” she said.

Study limitations include the absence of amyloid biomarkers. Investigators noted that participants had non-detectable levels of amyloid, likely due to the use of serum vs cerebrospinal fluid.

The study was funded by the National Institute on Aging and the National Heart, Lung, and Blood Institute. Mielke reported serving on scientific advisory boards and/or having consulted for Acadia, Biogen, Eisai, LabCorp, Lilly, Merck, PeerView Institute, Roche, Siemens Healthineers, and Sunbird Bio.

A version of this article appeared on Medscape.com.

Racial discrimination in Black Americans is associated with an increased risk of developing Alzheimer’s disease (AD) in later life, new findings showed.

Researchers found that Black Americans who experience racism in their 40s and 50s are more likely to have increased serum levels of AD biomarkers p-tau181 and neurofilament light (NfL) more than a decade later.

“We know that Black Americans are at an elevated risk of Alzheimer’s disease and other dementias compared to non-Hispanic White Americans, but we don’t fully understand all the factors that contribute to this disproportionate risk,” Michelle Mielke, PhD, co-author and professor of epidemiology and prevention at Wake Forest University School of Medicine, Winston-Salem, North Carolina, said in a press release.

Recent data show AD is twice as prevalent in Black Americans as in Whites, at 18.6% and 10%, respectively. Dr. Mielke said this level of disparity cannot be attributed solely to genetic differences, and evidence suggests that racism and its related stress may play a role.

The findings were published online in Alzheimer’s and Dementia.
 

AD Biomarker Testing

To further explore a possible link between exposure to racism and AD risk, investigators analyzed data from the Family and Community Health Study, a multisite, longitudinal investigation that included more than 800 families in the United States.

Blood samples and information on racial discrimination were collected from 255 middle-aged Black Americans between 2002 and 2005.

Blood samples were tested for serum phosphorylated tau181 (p-Tau181), a marker of AD pathology; NfL, a nonspecific marker of neurodegeneration; and glial fibrillary acidic protein (GFAP), a marker of brain inflammation.

Participants answered questions about racial discrimination, which included whether they have been subjected to disrespectful treatment including racial slurs, harassment from law enforcement, or if they had ever been excluded from social activities because of their race.

The sample included 212 females and 43 males with a mean age of 46. Most participants (70%) lived in urban areas.
 

Stress-Related?

Investigators found no correlation between racial discrimination and increased levels of AD blood biomarkers in 2008 when participants were a mean age of 46 years. However, 11 years later, when participants were roughly 57 years old, investigators found experiencing racism in middle age was significantly correlated with higher levels of both p-Tau181 (r = 0.158; P ≤ .012) and NfL (r = 0.143; P ≤ .023). There was no significant association between reported discrimination and GFAP.

“These findings support the hypothesis that unique life stressors encountered by Black Americans in midlife become biologically embedded and contribute to AD pathology and neurodegeneration later in life,” the authors wrote.

Investigators speculated based on previous research that the stress related to discrimination may be associated with reductions in hippocampal and prefrontal cortex volumes and neurodegeneration in general.

Dr. Mielke also said it’s clear that future studies should focus on racism experienced by Black Americans to further understand their risk for dementia.

“This research can help inform policies and interventions to reduce racial disparities and reduce dementia risk,” she said.

Study limitations include the absence of amyloid biomarkers. Investigators noted that participants had non-detectable levels of amyloid, likely due to the use of serum vs cerebrospinal fluid.

The study was funded by the National Institute on Aging and the National Heart, Lung, and Blood Institute. Mielke reported serving on scientific advisory boards and/or having consulted for Acadia, Biogen, Eisai, LabCorp, Lilly, Merck, PeerView Institute, Roche, Siemens Healthineers, and Sunbird Bio.

A version of this article appeared on Medscape.com.

Racial discrimination in Black Americans is associated with an increased risk of developing Alzheimer’s disease (AD) in later life, new findings showed.

Researchers found that Black Americans who experience racism in their 40s and 50s are more likely to have increased serum levels of AD biomarkers p-tau181 and neurofilament light (NfL) more than a decade later.

“We know that Black Americans are at an elevated risk of Alzheimer’s disease and other dementias compared to non-Hispanic White Americans, but we don’t fully understand all the factors that contribute to this disproportionate risk,” Michelle Mielke, PhD, co-author and professor of epidemiology and prevention at Wake Forest University School of Medicine, Winston-Salem, North Carolina, said in a press release.

Recent data show AD is twice as prevalent in Black Americans as in Whites, at 18.6% and 10%, respectively. Dr. Mielke said this level of disparity cannot be attributed solely to genetic differences, and evidence suggests that racism and its related stress may play a role.

The findings were published online in Alzheimer’s and Dementia.
 

AD Biomarker Testing

To further explore a possible link between exposure to racism and AD risk, investigators analyzed data from the Family and Community Health Study, a multisite, longitudinal investigation that included more than 800 families in the United States.

Blood samples and information on racial discrimination were collected from 255 middle-aged Black Americans between 2002 and 2005.

Blood samples were tested for serum phosphorylated tau181 (p-Tau181), a marker of AD pathology; NfL, a nonspecific marker of neurodegeneration; and glial fibrillary acidic protein (GFAP), a marker of brain inflammation.

Participants answered questions about racial discrimination, which included whether they have been subjected to disrespectful treatment including racial slurs, harassment from law enforcement, or if they had ever been excluded from social activities because of their race.

The sample included 212 females and 43 males with a mean age of 46. Most participants (70%) lived in urban areas.
 

Stress-Related?

Investigators found no correlation between racial discrimination and increased levels of AD blood biomarkers in 2008 when participants were a mean age of 46 years. However, 11 years later, when participants were roughly 57 years old, investigators found experiencing racism in middle age was significantly correlated with higher levels of both p-Tau181 (r = 0.158; P ≤ .012) and NfL (r = 0.143; P ≤ .023). There was no significant association between reported discrimination and GFAP.

“These findings support the hypothesis that unique life stressors encountered by Black Americans in midlife become biologically embedded and contribute to AD pathology and neurodegeneration later in life,” the authors wrote.

Investigators speculated based on previous research that the stress related to discrimination may be associated with reductions in hippocampal and prefrontal cortex volumes and neurodegeneration in general.

Dr. Mielke also said it’s clear that future studies should focus on racism experienced by Black Americans to further understand their risk for dementia.

“This research can help inform policies and interventions to reduce racial disparities and reduce dementia risk,” she said.

Study limitations include the absence of amyloid biomarkers. Investigators noted that participants had non-detectable levels of amyloid, likely due to the use of serum vs cerebrospinal fluid.

The study was funded by the National Institute on Aging and the National Heart, Lung, and Blood Institute. Mielke reported serving on scientific advisory boards and/or having consulted for Acadia, Biogen, Eisai, LabCorp, Lilly, Merck, PeerView Institute, Roche, Siemens Healthineers, and Sunbird Bio.

A version of this article appeared on Medscape.com.

Clinicians interested in treating patients with symptoms of mild cognitive impairment or mild dementia should carefully analyze the potential benefits and harms of monoclonal amyloid beta therapy, including likelihood of side effects and overall burden on the patient, according to researchers at the annual meeting of the American Geriatrics Society (AGS). 

Lecanemab (Leqembi) may help some patients by lowering the level of beta-amyloid protein in the brain. Results from a phase 3 trial presented at the conference showed participants with Alzheimer’s disease had a 27% slower progression of the disease compared with placebo.

But clinicians must weigh that advantage against risks and contraindications, according to Esther Oh, MD, PhD, an associate professor in the Division of Geriatric Medicine and Gerontology and co-director of the Johns Hopkins Memory and Alzheimer’s Treatment Center, Johns Hopkins University, Baltimore, Maryland, who spoke during a plenary session. Lecanemab gained accelerated approval by the US Food and Drug Administration in January 2023 and full approval in July 2023.

The results from CLARITY, an 18-month, multicenter, double-blind trial involving 1795 participants aged 50-90 years, showed that the variation between treatment and placebo did not meet the criteria for a minimum clinically important difference for mild cognitive impairment or mild Alzheimer’s disease.

Even more concerning to Dr. Oh was the rate of amyloid-related abnormalities on brain imaging, which can cause brain edema and hemorrhage (12.6% and 17.3%, respectively). Almost 85% of cases were asymptomatic. 

The risk for abnormalities indicates that thrombolytics are contraindicated for patients taking the drug, according to Dr. Oh. 

“Appropriate use recommendations exclude vitamin K antagonists such as warfarin, direct oral anticoagulants and heparin, although aspirin and other antiplatelet agents are allowed,” Dr. Oh said during the presentation.

Blood biomarkers, PET imaging, and levels of amyloid-beta proteins in cerebrospinal fluid are used to determine eligibility for lecanemab. However, tau biomarkers may indicate signs of cognitive impairment decades prior to symptoms. Some evidence indicates that the drug may be more effective in individuals with low tau levels that are evident in earlier stages of disease. Tau can also be determined from cerebrospinal fluid, however, “we do not factor in tau protein as a biomarker for treatment eligibility, but this may become an important biomarker in the future,” Dr. Oh said.

Lecanemab is cost-prohibitive for many patients, with an annual price tag of $26,000. Treatment also requires monthly infusions, a PET, intravenous administration, lab work, multiple MRIs, and potentially an APOE4 serum test.

Medicare covers the majority of services, but patients are responsible for deductibles and copays, an estimated $7000 annually, according to Shari Ling, MD, deputy chief medical officer with the US Centers for Medicare & Medicaid Services, who also spoke during the session. Supplemental or other insurance such as Medicaid are also not included in this estimate.

The Medicare population is growing more complex over time, Dr. Ling said. In 2021, 54% of beneficiaries had five or more comorbidities, which can affect eligibility for lecanemab. 

“Across the healthcare system, we are learning what is necessary for coordination of delivery, for evaluation of people who receive these treatments, and for the care that is not anticipated,” Dr. Ling noted.

Neither speaker reported any financial conflicts of interest.

A version of this article first appeared on Medscape.com.

Clinicians interested in treating patients with symptoms of mild cognitive impairment or mild dementia should carefully analyze the potential benefits and harms of monoclonal amyloid beta therapy, including likelihood of side effects and overall burden on the patient, according to researchers at the annual meeting of the American Geriatrics Society (AGS). 

Lecanemab (Leqembi) may help some patients by lowering the level of beta-amyloid protein in the brain. Results from a phase 3 trial presented at the conference showed participants with Alzheimer’s disease had a 27% slower progression of the disease compared with placebo.

But clinicians must weigh that advantage against risks and contraindications, according to Esther Oh, MD, PhD, an associate professor in the Division of Geriatric Medicine and Gerontology and co-director of the Johns Hopkins Memory and Alzheimer’s Treatment Center, Johns Hopkins University, Baltimore, Maryland, who spoke during a plenary session. Lecanemab gained accelerated approval by the US Food and Drug Administration in January 2023 and full approval in July 2023.

The results from CLARITY, an 18-month, multicenter, double-blind trial involving 1795 participants aged 50-90 years, showed that the variation between treatment and placebo did not meet the criteria for a minimum clinically important difference for mild cognitive impairment or mild Alzheimer’s disease.

Even more concerning to Dr. Oh was the rate of amyloid-related abnormalities on brain imaging, which can cause brain edema and hemorrhage (12.6% and 17.3%, respectively). Almost 85% of cases were asymptomatic. 

The risk for abnormalities indicates that thrombolytics are contraindicated for patients taking the drug, according to Dr. Oh. 

“Appropriate use recommendations exclude vitamin K antagonists such as warfarin, direct oral anticoagulants and heparin, although aspirin and other antiplatelet agents are allowed,” Dr. Oh said during the presentation.

Blood biomarkers, PET imaging, and levels of amyloid-beta proteins in cerebrospinal fluid are used to determine eligibility for lecanemab. However, tau biomarkers may indicate signs of cognitive impairment decades prior to symptoms. Some evidence indicates that the drug may be more effective in individuals with low tau levels that are evident in earlier stages of disease. Tau can also be determined from cerebrospinal fluid, however, “we do not factor in tau protein as a biomarker for treatment eligibility, but this may become an important biomarker in the future,” Dr. Oh said.

Lecanemab is cost-prohibitive for many patients, with an annual price tag of $26,000. Treatment also requires monthly infusions, a PET, intravenous administration, lab work, multiple MRIs, and potentially an APOE4 serum test.

Medicare covers the majority of services, but patients are responsible for deductibles and copays, an estimated $7000 annually, according to Shari Ling, MD, deputy chief medical officer with the US Centers for Medicare & Medicaid Services, who also spoke during the session. Supplemental or other insurance such as Medicaid are also not included in this estimate.

The Medicare population is growing more complex over time, Dr. Ling said. In 2021, 54% of beneficiaries had five or more comorbidities, which can affect eligibility for lecanemab. 

“Across the healthcare system, we are learning what is necessary for coordination of delivery, for evaluation of people who receive these treatments, and for the care that is not anticipated,” Dr. Ling noted.

Neither speaker reported any financial conflicts of interest.

A version of this article first appeared on Medscape.com.

Clinicians interested in treating patients with symptoms of mild cognitive impairment or mild dementia should carefully analyze the potential benefits and harms of monoclonal amyloid beta therapy, including likelihood of side effects and overall burden on the patient, according to researchers at the annual meeting of the American Geriatrics Society (AGS). 

Lecanemab (Leqembi) may help some patients by lowering the level of beta-amyloid protein in the brain. Results from a phase 3 trial presented at the conference showed participants with Alzheimer’s disease had a 27% slower progression of the disease compared with placebo.

But clinicians must weigh that advantage against risks and contraindications, according to Esther Oh, MD, PhD, an associate professor in the Division of Geriatric Medicine and Gerontology and co-director of the Johns Hopkins Memory and Alzheimer’s Treatment Center, Johns Hopkins University, Baltimore, Maryland, who spoke during a plenary session. Lecanemab gained accelerated approval by the US Food and Drug Administration in January 2023 and full approval in July 2023.

The results from CLARITY, an 18-month, multicenter, double-blind trial involving 1795 participants aged 50-90 years, showed that the variation between treatment and placebo did not meet the criteria for a minimum clinically important difference for mild cognitive impairment or mild Alzheimer’s disease.

Even more concerning to Dr. Oh was the rate of amyloid-related abnormalities on brain imaging, which can cause brain edema and hemorrhage (12.6% and 17.3%, respectively). Almost 85% of cases were asymptomatic. 

The risk for abnormalities indicates that thrombolytics are contraindicated for patients taking the drug, according to Dr. Oh. 

“Appropriate use recommendations exclude vitamin K antagonists such as warfarin, direct oral anticoagulants and heparin, although aspirin and other antiplatelet agents are allowed,” Dr. Oh said during the presentation.

Blood biomarkers, PET imaging, and levels of amyloid-beta proteins in cerebrospinal fluid are used to determine eligibility for lecanemab. However, tau biomarkers may indicate signs of cognitive impairment decades prior to symptoms. Some evidence indicates that the drug may be more effective in individuals with low tau levels that are evident in earlier stages of disease. Tau can also be determined from cerebrospinal fluid, however, “we do not factor in tau protein as a biomarker for treatment eligibility, but this may become an important biomarker in the future,” Dr. Oh said.

Lecanemab is cost-prohibitive for many patients, with an annual price tag of $26,000. Treatment also requires monthly infusions, a PET, intravenous administration, lab work, multiple MRIs, and potentially an APOE4 serum test.

Medicare covers the majority of services, but patients are responsible for deductibles and copays, an estimated $7000 annually, according to Shari Ling, MD, deputy chief medical officer with the US Centers for Medicare & Medicaid Services, who also spoke during the session. Supplemental or other insurance such as Medicaid are also not included in this estimate.

The Medicare population is growing more complex over time, Dr. Ling said. In 2021, 54% of beneficiaries had five or more comorbidities, which can affect eligibility for lecanemab. 

“Across the healthcare system, we are learning what is necessary for coordination of delivery, for evaluation of people who receive these treatments, and for the care that is not anticipated,” Dr. Ling noted.

Neither speaker reported any financial conflicts of interest.

A version of this article first appeared on Medscape.com.

In a recent article in the American Journal of Obstetrics & Gynecology, Rebecca C. Thurston, PhD, and Pauline Maki, PhD, leading scientists in the area of menopause’s impact on brain function, presented data from their assessment of 248 late perimenopausal and postmenopausal women who reported hot flashes, also known as vasomotor symptoms (VMS).

Hot flashes are known to be associated with changes in brain white matter, carotid atherosclerosis, brain function, and memory. Dr. Thurston and colleagues objectively measured VMS over 24 hours, using skin conductance monitoring. Plasma concentrations of Alzheimer’s disease biomarkers, including the amyloid beta 42–to–amyloid beta 40 ratio, were assessed. The mean age of study participants was 59 years, and they experienced a mean of five objective VMS daily.

A key finding was that VMS, particularly those occurring during sleep, were associated with a significantly lower amyloid beta 42–to–beta 40 ratio. This finding suggests that nighttime VMS may be a marker of risk for Alzheimer’s disease.

Previous research has found that menopausal hormone therapy is associated with favorable changes in Alzheimer’s disease biomarkers. Likewise, large observational studies have shown a lower incidence of Alzheimer’s disease among women who initiate hormone therapy in their late perimenopausal or early postmenopausal years and continue such therapy long term.

The findings of this important study by Thurston and colleagues provide further evidence to support the tantalizing possibility that agents that reduce nighttime hot flashes (including hormone therapy) may lower the subsequent incidence of Alzheimer’s disease in high-risk women.
 

Dr. Kaunitz is a tenured professor and associate chair in the department of obstetrics and gynecology at the University of Florida College of Medicine–Jacksonville, and medical director and director of menopause and gynecologic ultrasound services at the University of Florida Southside Women’s Health, Jacksonville. He disclosed ties to Sumitomo Pharma America, Mithra, Viatris, Bayer, Merck, Mylan (Viatris), and UpToDate.

A version of this article appeared on Medscape.com.

In a recent article in the American Journal of Obstetrics & Gynecology, Rebecca C. Thurston, PhD, and Pauline Maki, PhD, leading scientists in the area of menopause’s impact on brain function, presented data from their assessment of 248 late perimenopausal and postmenopausal women who reported hot flashes, also known as vasomotor symptoms (VMS).

Hot flashes are known to be associated with changes in brain white matter, carotid atherosclerosis, brain function, and memory. Dr. Thurston and colleagues objectively measured VMS over 24 hours, using skin conductance monitoring. Plasma concentrations of Alzheimer’s disease biomarkers, including the amyloid beta 42–to–amyloid beta 40 ratio, were assessed. The mean age of study participants was 59 years, and they experienced a mean of five objective VMS daily.

A key finding was that VMS, particularly those occurring during sleep, were associated with a significantly lower amyloid beta 42–to–beta 40 ratio. This finding suggests that nighttime VMS may be a marker of risk for Alzheimer’s disease.

Previous research has found that menopausal hormone therapy is associated with favorable changes in Alzheimer’s disease biomarkers. Likewise, large observational studies have shown a lower incidence of Alzheimer’s disease among women who initiate hormone therapy in their late perimenopausal or early postmenopausal years and continue such therapy long term.

The findings of this important study by Thurston and colleagues provide further evidence to support the tantalizing possibility that agents that reduce nighttime hot flashes (including hormone therapy) may lower the subsequent incidence of Alzheimer’s disease in high-risk women.
 

Dr. Kaunitz is a tenured professor and associate chair in the department of obstetrics and gynecology at the University of Florida College of Medicine–Jacksonville, and medical director and director of menopause and gynecologic ultrasound services at the University of Florida Southside Women’s Health, Jacksonville. He disclosed ties to Sumitomo Pharma America, Mithra, Viatris, Bayer, Merck, Mylan (Viatris), and UpToDate.

A version of this article appeared on Medscape.com.

In a recent article in the American Journal of Obstetrics & Gynecology, Rebecca C. Thurston, PhD, and Pauline Maki, PhD, leading scientists in the area of menopause’s impact on brain function, presented data from their assessment of 248 late perimenopausal and postmenopausal women who reported hot flashes, also known as vasomotor symptoms (VMS).

Hot flashes are known to be associated with changes in brain white matter, carotid atherosclerosis, brain function, and memory. Dr. Thurston and colleagues objectively measured VMS over 24 hours, using skin conductance monitoring. Plasma concentrations of Alzheimer’s disease biomarkers, including the amyloid beta 42–to–amyloid beta 40 ratio, were assessed. The mean age of study participants was 59 years, and they experienced a mean of five objective VMS daily.

A key finding was that VMS, particularly those occurring during sleep, were associated with a significantly lower amyloid beta 42–to–beta 40 ratio. This finding suggests that nighttime VMS may be a marker of risk for Alzheimer’s disease.

Previous research has found that menopausal hormone therapy is associated with favorable changes in Alzheimer’s disease biomarkers. Likewise, large observational studies have shown a lower incidence of Alzheimer’s disease among women who initiate hormone therapy in their late perimenopausal or early postmenopausal years and continue such therapy long term.

The findings of this important study by Thurston and colleagues provide further evidence to support the tantalizing possibility that agents that reduce nighttime hot flashes (including hormone therapy) may lower the subsequent incidence of Alzheimer’s disease in high-risk women.
 

Dr. Kaunitz is a tenured professor and associate chair in the department of obstetrics and gynecology at the University of Florida College of Medicine–Jacksonville, and medical director and director of menopause and gynecologic ultrasound services at the University of Florida Southside Women’s Health, Jacksonville. He disclosed ties to Sumitomo Pharma America, Mithra, Viatris, Bayer, Merck, Mylan (Viatris), and UpToDate.

A version of this article appeared on Medscape.com.

Lower urinary tract symptoms were significantly associated with lower scores on measures of cognitive impairment in older adults, based on data from approximately 10,000 individuals.

“We know that lower urinary tract symptoms are very common in aging men and women;” however, older adults often underreport symptoms and avoid seeking treatment, Belinda Williams, MD, of the University of Alabama, Birmingham, said in a presentation at the annual meeting of the American Geriatrics Society.

“Evidence also shows us that the incidence of lower urinary tract symptoms (LUTS) is higher in patients with dementia,” she said. However, the association between cognitive impairment and LUTS has not been well studied, she said.

To address this knowledge gap, Dr. Williams and colleagues reviewed data from older adults with and without LUTS who were enrolled in the REasons for Geographic and Racial Differences in Stroke (REGARDS) study, a cohort study including 30,239 Black or White adults aged 45 years and older who completed telephone or in-home assessments in 2003-2007 and in 2013-2017.

The study population included 6062 women and 4438 men who responded to questionnaires about LUTS and completed several cognitive tests via telephone in 2019-2010. The tests evaluated verbal fluency, executive function, and memory, and included the Six-Item Screener, Animal Naming, Letter F naming, and word list learning; lower scores indicated poorer cognitive performance.

Participants who met the criteria for LUTS were categorized as having mild, moderate, or severe symptoms.

The researchers controlled for age, race, education, income, and urban/rural setting in a multivariate analysis. The mean ages of the women and men were 69 years and 63 years, respectively; 41% and 32% were Black, 59% and 68% were White.

Overall, 70% of women and 62% of men reported LUTS; 6.2% and 8.2%, respectively, met criteria for cognitive impairment. The association between cognitive impairment and LUTS was statistically significant for all specific tests (P < .01), but not for the global cognitive domain tests.

Black men were more likely to report LUTS than White men, but LUTS reports were similar between Black and White women.

Moderate LUTS was the most common degree of severity for men and women (54% and 64%, respectively).

The most common symptom overall was pre-toilet leakage (urge urinary incontinence), reported by 94% of women and 91% of men. The next most common symptoms for men and women were nocturia and urgency.

“We found that, across the board, in all the cognitive tests, LUTS were associated with lower cognitive test scores,” Dr. Williams said in her presentation. Little differences were seen on the Six-Item Screener, she noted, but when they further analyzed the data using scores lower than 4 to indicate cognitive impairment, they found significant association with LUTS, she said.

The results showing that the presence of LUTS was consistently associated with lower cognitive test scores of verbal fluency, executive function, and memory, are applicable in clinical practice, Dr. Williams said in her presentation.

“Recognizing the subtle changes in cognition among older adults with LUTS may impact treatment decisions,” she said. “For example, we can encourage and advise our patients to be physically and cognitively active and to avoid anticholinergic medications.”

Next steps for research include analyzing longitudinal changes in cognition among participants with and without LUTS, said Dr. Williams.

During a question-and-answer session, Dr. Williams agreed with a comment that incorporating cognitive screening strategies in to LUTS clinical pathways might be helpful, such as conducting a baseline Montreal Cognitive Assessment Test (MoCA) in patients with LUTS. “Periodic repeat MoCAs thereafter can help assess decline in cognition,” she said.

The study was supported by the National Institutes of Neurological Disorders and Stroke and the National Institute on Aging. The researchers had no financial conflicts to disclose.

Lower urinary tract symptoms were significantly associated with lower scores on measures of cognitive impairment in older adults, based on data from approximately 10,000 individuals.

“We know that lower urinary tract symptoms are very common in aging men and women;” however, older adults often underreport symptoms and avoid seeking treatment, Belinda Williams, MD, of the University of Alabama, Birmingham, said in a presentation at the annual meeting of the American Geriatrics Society.

“Evidence also shows us that the incidence of lower urinary tract symptoms (LUTS) is higher in patients with dementia,” she said. However, the association between cognitive impairment and LUTS has not been well studied, she said.

To address this knowledge gap, Dr. Williams and colleagues reviewed data from older adults with and without LUTS who were enrolled in the REasons for Geographic and Racial Differences in Stroke (REGARDS) study, a cohort study including 30,239 Black or White adults aged 45 years and older who completed telephone or in-home assessments in 2003-2007 and in 2013-2017.

The study population included 6062 women and 4438 men who responded to questionnaires about LUTS and completed several cognitive tests via telephone in 2019-2010. The tests evaluated verbal fluency, executive function, and memory, and included the Six-Item Screener, Animal Naming, Letter F naming, and word list learning; lower scores indicated poorer cognitive performance.

Participants who met the criteria for LUTS were categorized as having mild, moderate, or severe symptoms.

The researchers controlled for age, race, education, income, and urban/rural setting in a multivariate analysis. The mean ages of the women and men were 69 years and 63 years, respectively; 41% and 32% were Black, 59% and 68% were White.

Overall, 70% of women and 62% of men reported LUTS; 6.2% and 8.2%, respectively, met criteria for cognitive impairment. The association between cognitive impairment and LUTS was statistically significant for all specific tests (P < .01), but not for the global cognitive domain tests.

Black men were more likely to report LUTS than White men, but LUTS reports were similar between Black and White women.

Moderate LUTS was the most common degree of severity for men and women (54% and 64%, respectively).

The most common symptom overall was pre-toilet leakage (urge urinary incontinence), reported by 94% of women and 91% of men. The next most common symptoms for men and women were nocturia and urgency.

“We found that, across the board, in all the cognitive tests, LUTS were associated with lower cognitive test scores,” Dr. Williams said in her presentation. Little differences were seen on the Six-Item Screener, she noted, but when they further analyzed the data using scores lower than 4 to indicate cognitive impairment, they found significant association with LUTS, she said.

The results showing that the presence of LUTS was consistently associated with lower cognitive test scores of verbal fluency, executive function, and memory, are applicable in clinical practice, Dr. Williams said in her presentation.

“Recognizing the subtle changes in cognition among older adults with LUTS may impact treatment decisions,” she said. “For example, we can encourage and advise our patients to be physically and cognitively active and to avoid anticholinergic medications.”

Next steps for research include analyzing longitudinal changes in cognition among participants with and without LUTS, said Dr. Williams.

During a question-and-answer session, Dr. Williams agreed with a comment that incorporating cognitive screening strategies in to LUTS clinical pathways might be helpful, such as conducting a baseline Montreal Cognitive Assessment Test (MoCA) in patients with LUTS. “Periodic repeat MoCAs thereafter can help assess decline in cognition,” she said.

The study was supported by the National Institutes of Neurological Disorders and Stroke and the National Institute on Aging. The researchers had no financial conflicts to disclose.

Lower urinary tract symptoms were significantly associated with lower scores on measures of cognitive impairment in older adults, based on data from approximately 10,000 individuals.

“We know that lower urinary tract symptoms are very common in aging men and women;” however, older adults often underreport symptoms and avoid seeking treatment, Belinda Williams, MD, of the University of Alabama, Birmingham, said in a presentation at the annual meeting of the American Geriatrics Society.

“Evidence also shows us that the incidence of lower urinary tract symptoms (LUTS) is higher in patients with dementia,” she said. However, the association between cognitive impairment and LUTS has not been well studied, she said.

To address this knowledge gap, Dr. Williams and colleagues reviewed data from older adults with and without LUTS who were enrolled in the REasons for Geographic and Racial Differences in Stroke (REGARDS) study, a cohort study including 30,239 Black or White adults aged 45 years and older who completed telephone or in-home assessments in 2003-2007 and in 2013-2017.

The study population included 6062 women and 4438 men who responded to questionnaires about LUTS and completed several cognitive tests via telephone in 2019-2010. The tests evaluated verbal fluency, executive function, and memory, and included the Six-Item Screener, Animal Naming, Letter F naming, and word list learning; lower scores indicated poorer cognitive performance.

Participants who met the criteria for LUTS were categorized as having mild, moderate, or severe symptoms.

The researchers controlled for age, race, education, income, and urban/rural setting in a multivariate analysis. The mean ages of the women and men were 69 years and 63 years, respectively; 41% and 32% were Black, 59% and 68% were White.

Overall, 70% of women and 62% of men reported LUTS; 6.2% and 8.2%, respectively, met criteria for cognitive impairment. The association between cognitive impairment and LUTS was statistically significant for all specific tests (P < .01), but not for the global cognitive domain tests.

Black men were more likely to report LUTS than White men, but LUTS reports were similar between Black and White women.

Moderate LUTS was the most common degree of severity for men and women (54% and 64%, respectively).

The most common symptom overall was pre-toilet leakage (urge urinary incontinence), reported by 94% of women and 91% of men. The next most common symptoms for men and women were nocturia and urgency.

“We found that, across the board, in all the cognitive tests, LUTS were associated with lower cognitive test scores,” Dr. Williams said in her presentation. Little differences were seen on the Six-Item Screener, she noted, but when they further analyzed the data using scores lower than 4 to indicate cognitive impairment, they found significant association with LUTS, she said.

The results showing that the presence of LUTS was consistently associated with lower cognitive test scores of verbal fluency, executive function, and memory, are applicable in clinical practice, Dr. Williams said in her presentation.

“Recognizing the subtle changes in cognition among older adults with LUTS may impact treatment decisions,” she said. “For example, we can encourage and advise our patients to be physically and cognitively active and to avoid anticholinergic medications.”

Next steps for research include analyzing longitudinal changes in cognition among participants with and without LUTS, said Dr. Williams.

During a question-and-answer session, Dr. Williams agreed with a comment that incorporating cognitive screening strategies in to LUTS clinical pathways might be helpful, such as conducting a baseline Montreal Cognitive Assessment Test (MoCA) in patients with LUTS. “Periodic repeat MoCAs thereafter can help assess decline in cognition,” she said.

The study was supported by the National Institutes of Neurological Disorders and Stroke and the National Institute on Aging. The researchers had no financial conflicts to disclose.

Hospitalized patients with dementia and dysphagia are often prescribed a “dysphagia diet,” made up of texture-modified foods and thickened liquids in an effort to reduce the risk for aspiration or other problems. However, a new study calls this widespread and long-held practice into question.

Investigators found no evidence that the use of thickened liquids reduced mortality or respiratory complications, such as pneumonia, aspiration, or choking, compared with thin-liquid diets in patients with Alzheimer’s disease and related dementias (ADRD) and dysphagia. Patients receiving thick liquids were less likely to be intubated, but they were actually more likely to have respiratory complications.

“When hospitalized patients with Alzheimer’s disease and related dementias are found to have dysphagia, our go-to solution is to use a thick liquid diet,” senior author Liron Sinvani, MD, with the Feinstein Institutes for Medical Research, Manhasset, New York, said in a news release.

“However, there is no concrete evidence that thick liquids improve health outcomes, and we also know that thick liquids can lead to decreased palatability, poor oral intake, dehydration, malnutrition, and worse quality of life,” added Dr. Sinvani, director of the geriatric hospitalist service at Northwell Health in New York.

The study was published online in JAMA Internal Medicine.
 

Challenging a Go-To Solution

The researchers compared outcomes in a propensity score-matched cohort of patients with ADRD and dysphagia (mean age, 86 years; 54% women) receiving mostly thick liquids versus thin liquids during their hospitalization. There were 4458 patients in each group.

They found no significant difference in hospital mortality between the thick liquids and thin liquids groups (hazard ratio [HR], 0.92; P = .46).

Patients receiving thick liquids were less likely to require intubation (odds ratio [OR], 0.66; 95% CI, 0.54-0.80) but were more likely to develop respiratory complications (OR, 1.73; 95% CI, 1.56-1.91).

The two groups did not differ significantly in terms of risk for dehydration, hospital length of stay, or rate of 30-day readmission.

“This cohort study emphasizes the need for prospective studies that evaluate whether thick liquids are associated with improved clinical outcomes in hospitalized patients with ADRD and dysphagia,” the authors wrote.

Because few patients received a Modified Barium Swallow Study at baseline, researchers were unable to confirm the presence of dysphagia or account for dysphagia severity and impairment. It’s possible that patients in the thick liquid group had more severe dysphagia than those in the thin liquid group.

Another limitation is that the type of dementia and severity were not characterized. Also, the study could not account for factors like oral hygiene, immune status, and diet adherence that could impact risks like aspiration pneumonia.
 

Theoretical Benefit, No Evidence

In an invited commentary on the study, Eric Widera, MD, with University of California San Francisco, noted that medicine is “littered with interventions that have become the standard of practice based on theoretical benefits without clinical evidence”.

One example is percutaneous endoscopic gastrostomy tubes for individuals with dysphagia and dementia.

“For decades, these tubes were regularly used in individuals with dementia on the assumption that bypassing the oropharyngeal route would decrease rates of aspiration and, therefore, decrease adverse outcomes like pressure ulcers, malnutrition, pneumonia, and death. However, similar to what we see with thickened liquids, evidence slowly built that this standard of practice was not evidence-based practice,” Dr. Widera wrote.

When thinking about thick liquid diets, Dr. Widera encouraged clinicians to “acknowledge the limitations of the evidence both for and against thickened-liquid diets.”

He also encouraged clinicians to “put yourself in the shoes of the patients who will be asked to adhere to this modified diet. For 12 hours, drink your tea, coffee, wine, and water as thickened liquids,” Dr. Widera suggested. “The goal is not to convince yourself never to prescribe thickened liquids, but rather to be mindful of how a thickened liquid diet affects patients’ liquid and food intake, how it changes the mouthfeel and taste of different drinks, and how it affects patients’ quality of life.”

Clinicians also should “proactively engage speech-language pathologists, but do not ask them if it is safe for a patient with dementia to eat or drink normally. Instead, ask what we can do to meet the patient’s goals and maintain quality of life given the current evidence base,” Dr. Widera wrote.

“For some, when the patient’s goals are focused on comfort, this may lead to a recommendation for thickened liquids if their use may resolve significant coughing distress after drinking thin liquids. Alternatively, even when the patient’s goals are focused on prolonging life, the risks of thickened liquids, including dehydration and decreased food and fluid intake, as well as the thin evidence for mortality improvement, will argue against their use,” Dr. Widera added.

Funding for the study was provided by grants from the National Institute on Aging and by the William S. Middleton Veteran Affairs Hospital, Madison, Wisconsin. Dr. Sinvani and Dr. Widera declared no relevant conflicts of interest.

A version of this article appeared on Medscape.com .

Hospitalized patients with dementia and dysphagia are often prescribed a “dysphagia diet,” made up of texture-modified foods and thickened liquids in an effort to reduce the risk for aspiration or other problems. However, a new study calls this widespread and long-held practice into question.

Investigators found no evidence that the use of thickened liquids reduced mortality or respiratory complications, such as pneumonia, aspiration, or choking, compared with thin-liquid diets in patients with Alzheimer’s disease and related dementias (ADRD) and dysphagia. Patients receiving thick liquids were less likely to be intubated, but they were actually more likely to have respiratory complications.

“When hospitalized patients with Alzheimer’s disease and related dementias are found to have dysphagia, our go-to solution is to use a thick liquid diet,” senior author Liron Sinvani, MD, with the Feinstein Institutes for Medical Research, Manhasset, New York, said in a news release.

“However, there is no concrete evidence that thick liquids improve health outcomes, and we also know that thick liquids can lead to decreased palatability, poor oral intake, dehydration, malnutrition, and worse quality of life,” added Dr. Sinvani, director of the geriatric hospitalist service at Northwell Health in New York.

The study was published online in JAMA Internal Medicine.
 

Challenging a Go-To Solution

The researchers compared outcomes in a propensity score-matched cohort of patients with ADRD and dysphagia (mean age, 86 years; 54% women) receiving mostly thick liquids versus thin liquids during their hospitalization. There were 4458 patients in each group.

They found no significant difference in hospital mortality between the thick liquids and thin liquids groups (hazard ratio [HR], 0.92; P = .46).

Patients receiving thick liquids were less likely to require intubation (odds ratio [OR], 0.66; 95% CI, 0.54-0.80) but were more likely to develop respiratory complications (OR, 1.73; 95% CI, 1.56-1.91).

The two groups did not differ significantly in terms of risk for dehydration, hospital length of stay, or rate of 30-day readmission.

“This cohort study emphasizes the need for prospective studies that evaluate whether thick liquids are associated with improved clinical outcomes in hospitalized patients with ADRD and dysphagia,” the authors wrote.

Because few patients received a Modified Barium Swallow Study at baseline, researchers were unable to confirm the presence of dysphagia or account for dysphagia severity and impairment. It’s possible that patients in the thick liquid group had more severe dysphagia than those in the thin liquid group.

Another limitation is that the type of dementia and severity were not characterized. Also, the study could not account for factors like oral hygiene, immune status, and diet adherence that could impact risks like aspiration pneumonia.
 

Theoretical Benefit, No Evidence

In an invited commentary on the study, Eric Widera, MD, with University of California San Francisco, noted that medicine is “littered with interventions that have become the standard of practice based on theoretical benefits without clinical evidence”.

One example is percutaneous endoscopic gastrostomy tubes for individuals with dysphagia and dementia.

“For decades, these tubes were regularly used in individuals with dementia on the assumption that bypassing the oropharyngeal route would decrease rates of aspiration and, therefore, decrease adverse outcomes like pressure ulcers, malnutrition, pneumonia, and death. However, similar to what we see with thickened liquids, evidence slowly built that this standard of practice was not evidence-based practice,” Dr. Widera wrote.

When thinking about thick liquid diets, Dr. Widera encouraged clinicians to “acknowledge the limitations of the evidence both for and against thickened-liquid diets.”

He also encouraged clinicians to “put yourself in the shoes of the patients who will be asked to adhere to this modified diet. For 12 hours, drink your tea, coffee, wine, and water as thickened liquids,” Dr. Widera suggested. “The goal is not to convince yourself never to prescribe thickened liquids, but rather to be mindful of how a thickened liquid diet affects patients’ liquid and food intake, how it changes the mouthfeel and taste of different drinks, and how it affects patients’ quality of life.”

Clinicians also should “proactively engage speech-language pathologists, but do not ask them if it is safe for a patient with dementia to eat or drink normally. Instead, ask what we can do to meet the patient’s goals and maintain quality of life given the current evidence base,” Dr. Widera wrote.

“For some, when the patient’s goals are focused on comfort, this may lead to a recommendation for thickened liquids if their use may resolve significant coughing distress after drinking thin liquids. Alternatively, even when the patient’s goals are focused on prolonging life, the risks of thickened liquids, including dehydration and decreased food and fluid intake, as well as the thin evidence for mortality improvement, will argue against their use,” Dr. Widera added.

Funding for the study was provided by grants from the National Institute on Aging and by the William S. Middleton Veteran Affairs Hospital, Madison, Wisconsin. Dr. Sinvani and Dr. Widera declared no relevant conflicts of interest.

A version of this article appeared on Medscape.com .

Hospitalized patients with dementia and dysphagia are often prescribed a “dysphagia diet,” made up of texture-modified foods and thickened liquids in an effort to reduce the risk for aspiration or other problems. However, a new study calls this widespread and long-held practice into question.

Investigators found no evidence that the use of thickened liquids reduced mortality or respiratory complications, such as pneumonia, aspiration, or choking, compared with thin-liquid diets in patients with Alzheimer’s disease and related dementias (ADRD) and dysphagia. Patients receiving thick liquids were less likely to be intubated, but they were actually more likely to have respiratory complications.

“When hospitalized patients with Alzheimer’s disease and related dementias are found to have dysphagia, our go-to solution is to use a thick liquid diet,” senior author Liron Sinvani, MD, with the Feinstein Institutes for Medical Research, Manhasset, New York, said in a news release.

“However, there is no concrete evidence that thick liquids improve health outcomes, and we also know that thick liquids can lead to decreased palatability, poor oral intake, dehydration, malnutrition, and worse quality of life,” added Dr. Sinvani, director of the geriatric hospitalist service at Northwell Health in New York.

The study was published online in JAMA Internal Medicine.
 

Challenging a Go-To Solution

The researchers compared outcomes in a propensity score-matched cohort of patients with ADRD and dysphagia (mean age, 86 years; 54% women) receiving mostly thick liquids versus thin liquids during their hospitalization. There were 4458 patients in each group.

They found no significant difference in hospital mortality between the thick liquids and thin liquids groups (hazard ratio [HR], 0.92; P = .46).

Patients receiving thick liquids were less likely to require intubation (odds ratio [OR], 0.66; 95% CI, 0.54-0.80) but were more likely to develop respiratory complications (OR, 1.73; 95% CI, 1.56-1.91).

The two groups did not differ significantly in terms of risk for dehydration, hospital length of stay, or rate of 30-day readmission.

“This cohort study emphasizes the need for prospective studies that evaluate whether thick liquids are associated with improved clinical outcomes in hospitalized patients with ADRD and dysphagia,” the authors wrote.

Because few patients received a Modified Barium Swallow Study at baseline, researchers were unable to confirm the presence of dysphagia or account for dysphagia severity and impairment. It’s possible that patients in the thick liquid group had more severe dysphagia than those in the thin liquid group.

Another limitation is that the type of dementia and severity were not characterized. Also, the study could not account for factors like oral hygiene, immune status, and diet adherence that could impact risks like aspiration pneumonia.
 

Theoretical Benefit, No Evidence

In an invited commentary on the study, Eric Widera, MD, with University of California San Francisco, noted that medicine is “littered with interventions that have become the standard of practice based on theoretical benefits without clinical evidence”.

One example is percutaneous endoscopic gastrostomy tubes for individuals with dysphagia and dementia.

“For decades, these tubes were regularly used in individuals with dementia on the assumption that bypassing the oropharyngeal route would decrease rates of aspiration and, therefore, decrease adverse outcomes like pressure ulcers, malnutrition, pneumonia, and death. However, similar to what we see with thickened liquids, evidence slowly built that this standard of practice was not evidence-based practice,” Dr. Widera wrote.

When thinking about thick liquid diets, Dr. Widera encouraged clinicians to “acknowledge the limitations of the evidence both for and against thickened-liquid diets.”

He also encouraged clinicians to “put yourself in the shoes of the patients who will be asked to adhere to this modified diet. For 12 hours, drink your tea, coffee, wine, and water as thickened liquids,” Dr. Widera suggested. “The goal is not to convince yourself never to prescribe thickened liquids, but rather to be mindful of how a thickened liquid diet affects patients’ liquid and food intake, how it changes the mouthfeel and taste of different drinks, and how it affects patients’ quality of life.”

Clinicians also should “proactively engage speech-language pathologists, but do not ask them if it is safe for a patient with dementia to eat or drink normally. Instead, ask what we can do to meet the patient’s goals and maintain quality of life given the current evidence base,” Dr. Widera wrote.

“For some, when the patient’s goals are focused on comfort, this may lead to a recommendation for thickened liquids if their use may resolve significant coughing distress after drinking thin liquids. Alternatively, even when the patient’s goals are focused on prolonging life, the risks of thickened liquids, including dehydration and decreased food and fluid intake, as well as the thin evidence for mortality improvement, will argue against their use,” Dr. Widera added.

Funding for the study was provided by grants from the National Institute on Aging and by the William S. Middleton Veteran Affairs Hospital, Madison, Wisconsin. Dr. Sinvani and Dr. Widera declared no relevant conflicts of interest.

A version of this article appeared on Medscape.com .

This transcript has been edited for clarity.

As you all know by now, I’m always looking out for lifestyle changes that are both pleasurable and healthy. They are hard to find, especially when it comes to diet. My kids complain about this all the time: “When you say ‘healthy food,’ you just mean yucky food.” And yes, French fries are amazing, and no, we can’t have them three times a day.

So, when I saw an article claiming that olive oil reduces the risk for dementia, I was interested. I love olive oil; I cook with it all the time. But as is always the case in the world of nutritional epidemiology, we need to be careful. There are a lot of reasons to doubt the results of this study — and one reason to believe it’s true.

The study I’m talking about is “Consumption of Olive Oil and Diet Quality and Risk of Dementia-Related Death,” appearing in JAMA Network Open and following a well-trod formula in the nutritional epidemiology space.

Nearly 100,000 participants, all healthcare workers, filled out a food frequency questionnaire every 4 years with 130 questions touching on all aspects of diet: How often do you eat bananas, bacon, olive oil? Participants were followed for more than 20 years, and if they died, the cause of death was flagged as being dementia-related or not. Over that time frame there were around 38,000 deaths, of which 4751 were due to dementia.

The rest is just statistics. The authors show that those who reported consuming more olive oil were less likely to die from dementia — about 50% less likely, if you compare those who reported eating more than 7 grams of olive oil a day with those who reported eating none.
 

Is It What You Eat, or What You Don’t Eat?

And we could stop there if we wanted to; I’m sure big olive oil would be happy with that. Is there such a thing as “big olive oil”? But no, we need to dig deeper here because this study has the same problems as all nutritional epidemiology studies. Number one, no one is sitting around drinking small cups of olive oil. They consume it with other foods. And it was clear from the food frequency questionnaire that people who consumed more olive oil also consumed less red meat, more fruits and vegetables, more whole grains, more butter, and less margarine. And those are just the findings reported in the paper. I suspect that people who eat more olive oil also eat more tomatoes, for example, though data this granular aren’t shown. So, it can be really hard, in studies like this, to know for sure that it’s actually the olive oil that is helpful rather than some other constituent in the diet.

The flip side of that coin presents another issue. The food you eat is also a marker of the food you don’t eat. People who ate olive oil consumed less margarine, for example. At the time of this study, margarine was still adulterated with trans-fats, which a pretty solid evidence base suggests are really bad for your vascular system. So perhaps it’s not that olive oil is particularly good for you but that something else is bad for you. In other words, simply adding olive oil to your diet without changing anything else may not do anything.

The other major problem with studies of this sort is that people don’t consume food at random. The type of person who eats a lot of olive oil is simply different from the type of person who doesn›t. For one thing, olive oil is expensive. A 25-ounce bottle of olive oil is on sale at my local supermarket right now for $11.00. A similar-sized bottle of vegetable oil goes for $4.00.

Isn’t it interesting that food that costs more money tends to be associated with better health outcomes? (I’m looking at you, red wine.) Perhaps it’s not the food; perhaps it’s the money. We aren’t provided data on household income in this study, but we can see that the heavy olive oil users were less likely to be current smokers and they got more physical activity.

Now, the authors are aware of these limitations and do their best to account for them. In multivariable models, they adjust for other stuff in the diet, and even for income (sort of; they use census tract as a proxy for income, which is really a broad brush), and still find a significant though weakened association showing a protective effect of olive oil on dementia-related death. But still — adjustment is never perfect, and the small effect size here could definitely be due to residual confounding.
 

Evidence More Convincing

Now, I did tell you that there is one reason to believe that this study is true, but it’s not really from this study.

It’s from the PREDIMED randomized trial.

This is nutritional epidemiology I can get behind. Published in 2018, investigators in Spain randomized around 7500 participants to receive a liter of olive oil once a week vs mixed nuts, vs small nonfood gifts, the idea here being that if you have olive oil around, you’ll use it more. And people who were randomly assigned to get the olive oil had a 30% lower rate of cardiovascular events. A secondary analysis of that study found that the rate of development of mild cognitive impairment was 65% lower in those who were randomly assigned to olive oil. That’s an impressive result.

So, there might be something to this olive oil thing, but I’m not quite ready to add it to my “pleasurable things that are still good for you” list just yet. Though it does make me wonder: Can we make French fries in the stuff?
 

Dr. Wilson is associate professor of medicine and public health and director of the Clinical and Translational Research Accelerator at Yale University, New Haven, Conn. He has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

This transcript has been edited for clarity.

As you all know by now, I’m always looking out for lifestyle changes that are both pleasurable and healthy. They are hard to find, especially when it comes to diet. My kids complain about this all the time: “When you say ‘healthy food,’ you just mean yucky food.” And yes, French fries are amazing, and no, we can’t have them three times a day.

So, when I saw an article claiming that olive oil reduces the risk for dementia, I was interested. I love olive oil; I cook with it all the time. But as is always the case in the world of nutritional epidemiology, we need to be careful. There are a lot of reasons to doubt the results of this study — and one reason to believe it’s true.

The study I’m talking about is “Consumption of Olive Oil and Diet Quality and Risk of Dementia-Related Death,” appearing in JAMA Network Open and following a well-trod formula in the nutritional epidemiology space.

Nearly 100,000 participants, all healthcare workers, filled out a food frequency questionnaire every 4 years with 130 questions touching on all aspects of diet: How often do you eat bananas, bacon, olive oil? Participants were followed for more than 20 years, and if they died, the cause of death was flagged as being dementia-related or not. Over that time frame there were around 38,000 deaths, of which 4751 were due to dementia.

The rest is just statistics. The authors show that those who reported consuming more olive oil were less likely to die from dementia — about 50% less likely, if you compare those who reported eating more than 7 grams of olive oil a day with those who reported eating none.
 

Is It What You Eat, or What You Don’t Eat?

And we could stop there if we wanted to; I’m sure big olive oil would be happy with that. Is there such a thing as “big olive oil”? But no, we need to dig deeper here because this study has the same problems as all nutritional epidemiology studies. Number one, no one is sitting around drinking small cups of olive oil. They consume it with other foods. And it was clear from the food frequency questionnaire that people who consumed more olive oil also consumed less red meat, more fruits and vegetables, more whole grains, more butter, and less margarine. And those are just the findings reported in the paper. I suspect that people who eat more olive oil also eat more tomatoes, for example, though data this granular aren’t shown. So, it can be really hard, in studies like this, to know for sure that it’s actually the olive oil that is helpful rather than some other constituent in the diet.

The flip side of that coin presents another issue. The food you eat is also a marker of the food you don’t eat. People who ate olive oil consumed less margarine, for example. At the time of this study, margarine was still adulterated with trans-fats, which a pretty solid evidence base suggests are really bad for your vascular system. So perhaps it’s not that olive oil is particularly good for you but that something else is bad for you. In other words, simply adding olive oil to your diet without changing anything else may not do anything.

The other major problem with studies of this sort is that people don’t consume food at random. The type of person who eats a lot of olive oil is simply different from the type of person who doesn›t. For one thing, olive oil is expensive. A 25-ounce bottle of olive oil is on sale at my local supermarket right now for $11.00. A similar-sized bottle of vegetable oil goes for $4.00.

Isn’t it interesting that food that costs more money tends to be associated with better health outcomes? (I’m looking at you, red wine.) Perhaps it’s not the food; perhaps it’s the money. We aren’t provided data on household income in this study, but we can see that the heavy olive oil users were less likely to be current smokers and they got more physical activity.

Now, the authors are aware of these limitations and do their best to account for them. In multivariable models, they adjust for other stuff in the diet, and even for income (sort of; they use census tract as a proxy for income, which is really a broad brush), and still find a significant though weakened association showing a protective effect of olive oil on dementia-related death. But still — adjustment is never perfect, and the small effect size here could definitely be due to residual confounding.
 

Evidence More Convincing

Now, I did tell you that there is one reason to believe that this study is true, but it’s not really from this study.

It’s from the PREDIMED randomized trial.

This is nutritional epidemiology I can get behind. Published in 2018, investigators in Spain randomized around 7500 participants to receive a liter of olive oil once a week vs mixed nuts, vs small nonfood gifts, the idea here being that if you have olive oil around, you’ll use it more. And people who were randomly assigned to get the olive oil had a 30% lower rate of cardiovascular events. A secondary analysis of that study found that the rate of development of mild cognitive impairment was 65% lower in those who were randomly assigned to olive oil. That’s an impressive result.

So, there might be something to this olive oil thing, but I’m not quite ready to add it to my “pleasurable things that are still good for you” list just yet. Though it does make me wonder: Can we make French fries in the stuff?
 

Dr. Wilson is associate professor of medicine and public health and director of the Clinical and Translational Research Accelerator at Yale University, New Haven, Conn. He has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

This transcript has been edited for clarity.

As you all know by now, I’m always looking out for lifestyle changes that are both pleasurable and healthy. They are hard to find, especially when it comes to diet. My kids complain about this all the time: “When you say ‘healthy food,’ you just mean yucky food.” And yes, French fries are amazing, and no, we can’t have them three times a day.

So, when I saw an article claiming that olive oil reduces the risk for dementia, I was interested. I love olive oil; I cook with it all the time. But as is always the case in the world of nutritional epidemiology, we need to be careful. There are a lot of reasons to doubt the results of this study — and one reason to believe it’s true.

The study I’m talking about is “Consumption of Olive Oil and Diet Quality and Risk of Dementia-Related Death,” appearing in JAMA Network Open and following a well-trod formula in the nutritional epidemiology space.

Nearly 100,000 participants, all healthcare workers, filled out a food frequency questionnaire every 4 years with 130 questions touching on all aspects of diet: How often do you eat bananas, bacon, olive oil? Participants were followed for more than 20 years, and if they died, the cause of death was flagged as being dementia-related or not. Over that time frame there were around 38,000 deaths, of which 4751 were due to dementia.

The rest is just statistics. The authors show that those who reported consuming more olive oil were less likely to die from dementia — about 50% less likely, if you compare those who reported eating more than 7 grams of olive oil a day with those who reported eating none.
 

Is It What You Eat, or What You Don’t Eat?

And we could stop there if we wanted to; I’m sure big olive oil would be happy with that. Is there such a thing as “big olive oil”? But no, we need to dig deeper here because this study has the same problems as all nutritional epidemiology studies. Number one, no one is sitting around drinking small cups of olive oil. They consume it with other foods. And it was clear from the food frequency questionnaire that people who consumed more olive oil also consumed less red meat, more fruits and vegetables, more whole grains, more butter, and less margarine. And those are just the findings reported in the paper. I suspect that people who eat more olive oil also eat more tomatoes, for example, though data this granular aren’t shown. So, it can be really hard, in studies like this, to know for sure that it’s actually the olive oil that is helpful rather than some other constituent in the diet.

The flip side of that coin presents another issue. The food you eat is also a marker of the food you don’t eat. People who ate olive oil consumed less margarine, for example. At the time of this study, margarine was still adulterated with trans-fats, which a pretty solid evidence base suggests are really bad for your vascular system. So perhaps it’s not that olive oil is particularly good for you but that something else is bad for you. In other words, simply adding olive oil to your diet without changing anything else may not do anything.

The other major problem with studies of this sort is that people don’t consume food at random. The type of person who eats a lot of olive oil is simply different from the type of person who doesn›t. For one thing, olive oil is expensive. A 25-ounce bottle of olive oil is on sale at my local supermarket right now for $11.00. A similar-sized bottle of vegetable oil goes for $4.00.

Isn’t it interesting that food that costs more money tends to be associated with better health outcomes? (I’m looking at you, red wine.) Perhaps it’s not the food; perhaps it’s the money. We aren’t provided data on household income in this study, but we can see that the heavy olive oil users were less likely to be current smokers and they got more physical activity.

Now, the authors are aware of these limitations and do their best to account for them. In multivariable models, they adjust for other stuff in the diet, and even for income (sort of; they use census tract as a proxy for income, which is really a broad brush), and still find a significant though weakened association showing a protective effect of olive oil on dementia-related death. But still — adjustment is never perfect, and the small effect size here could definitely be due to residual confounding.
 

Evidence More Convincing

Now, I did tell you that there is one reason to believe that this study is true, but it’s not really from this study.

It’s from the PREDIMED randomized trial.

This is nutritional epidemiology I can get behind. Published in 2018, investigators in Spain randomized around 7500 participants to receive a liter of olive oil once a week vs mixed nuts, vs small nonfood gifts, the idea here being that if you have olive oil around, you’ll use it more. And people who were randomly assigned to get the olive oil had a 30% lower rate of cardiovascular events. A secondary analysis of that study found that the rate of development of mild cognitive impairment was 65% lower in those who were randomly assigned to olive oil. That’s an impressive result.

So, there might be something to this olive oil thing, but I’m not quite ready to add it to my “pleasurable things that are still good for you” list just yet. Though it does make me wonder: Can we make French fries in the stuff?
 

Dr. Wilson is associate professor of medicine and public health and director of the Clinical and Translational Research Accelerator at Yale University, New Haven, Conn. He has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

Medications that could have a negative effect on cognition are often used by older adults with dementia, according to data from approximately 13 million individuals presented at the annual meeting of the American Geriatrics Society.

Classes of medications including anticholinergics, antipsychotics, benzodiazepines, and non-benzodiazepine sedatives (Z drugs) have been identified as potentially inappropriate medications (PIMs) in patients with dementia, according to The American Geriatrics Society Beers Criteria for Potentially Inappropriate Medication Use in Older Adults.

The medications that could worsen dementia or cognition are known as CogPIMs, said presenting author Caroline M. Mak, a doctor of pharmacy candidate at the University at Buffalo School of Pharmacy and Pharmaceutical Sciences, New York.

Previous research has characterized the prevalence of use of CogPIMs, but data connecting use of CogPIMs and healthcare use are lacking, Ms. Mak said.

Ms. Mak and colleagues conducted a cross-sectional analysis of data from 2011 to 2015 from the Medical Expenditure Panel Survey (MEPS), a national survey with data on medication and healthcare use. The researchers included approximately 13 million survey respondents older than 65 years with dementia.

Exposure to CogPIMs was defined as filling a prescription for one or more of the CogPIMs during the study period. Population estimates of the prevalence of use of the CogPIMs were created using survey-weighted procedures, and prevalence trends were assessed using the Cochran-Armitage test.

Overall, the prevalence was 15.9%, 11.5%, 7.5%, and 3.8% for use of benzodiazepines, anticholinergics, antipsychotics, and Z drugs, respectively, during the study period.

Of these, benzodiazepines showed a significant trend with an increase in prevalence from 8.9% in 2011 to 16.4% in 2015 (P = .02).

The odds of hospitalization were more than twice as likely in individuals who reported using Z drugs (odds ratio, 2.57; P = .02) based on logistic regression. In addition, exposure to antipsychotics was significantly associated with an increased rate of hospitalization based on a binomial model for incidence rate ratio (IRR, 1.51; P = .02).

The findings were limited by several factors including the cross-sectional design, reliance on self-reports, and the lack of more recent data.

However, the results show that CogPIMs are often used by older adults with dementia, and antipsychotics and Z drugs could be targets for interventions to prevent harm from medication interactions and side effects, the researchers concluded.
 

Findings Highlight Need for Drug Awareness

The current study is important because of the expansion in the aging population and an increase in the number of patients with dementia, Ms. Mak said in an interview. “In both our older population and dementia patients, there are certain medication considerations that we need to take into account, and certain drugs that should be avoided if possible,” she said. Clinicians have been trying to use the Beers criteria to reduce potential medication harm, she noted. “One group of investigators (Hilmer et al.), has proposed a narrower focus on anticholinergic and sedative/hypnotic medication in the Drug Burden Index (DBI); the CogPIMs are a subset of both approaches (Beers and DBI) and represent a collection of medications that pose potential risks to our patients,” said Ms. Mak.

Continued reassessment is needed on appropriateness of anticholinergics, Z drugs, benzodiazepines, and antipsychotics in older patients with dementia, she added.

“Even though the only group to have a significant increase in prevalence [of use] was the benzodiazepine group, we didn’t see a decrease in any of the other groups,” said Ms. Mak. The current research provides a benchmark for CogPIMs use that can be monitored in the future for increases or, ideally, decreases, she said.
 

Part of a Bigger Picture

The current study is part of the work of Team Alice, a national deprescribing group affiliated with the University at Buffalo that was inspired by the tragic death of Alice Brennan, triggered by preventable medication harm, Ms. Mak said in an interview. “Team Alice consists of an array of academic, primary care, health plan, and regional health information partners that have designed patient-driven interventions to reduce medication harm, especially within primary care settings,” she said. “Their mission is to save people like Alice by pursuing multiple strategies to deprescribe unsafe medication, reduce harm, and foster successful aging. By characterizing the use of CogPIMs, we can design better intervention strategies,” she said.

Although Ms. Mak was not surprised by the emergence of benzodiazepines as the most commonly used drug groups, she was surprised by the increase during the study period.

“Unfortunately, our dataset was not rich enough to include reasons for this increase,” she said. In practice, “I have seen patients getting short-term, as needed, prescriptions for a benzodiazepine to address the anxiety and/or insomnia after the loss of a loved one; this may account for a small proportion of benzodiazepine use that appears to be inappropriate because of a lack of associated appropriate diagnosis,” she noted.

Also, the findings of increased hospitalization associated with Z drugs raises concerns, Ms. Mak said. Although the findings are consistent with other research, they illustrate the need for further investigation to identify strategies to prevent this harm, she said. “Not finding associations with hospitalization related to benzodiazepine or anticholinergics was a mild surprise,” Ms. Mak said in an interview. “However, while we know that these drugs can have a negative effect on older people, the effects may not have been severe enough to result in hospitalizations,” she said.

Looking ahead, Ms. Mak said she would like to see the study rerun with a more current data set, especially with regard to benzodiazepines and antipsychotics.
 

Seek Strategies to Reduce Medication Use

The current study was notable for its community-based population and attention to hospitalizations, Shelly Gray, PharmD, a professor of pharmacy at the University of Washington School of Pharmacy, said in an interview.

“Most studies examining potentially inappropriate medications that may impair cognition have been conducted in nursing homes, while this study focuses on community dwelling older adults where most people with dementia live,” said Dr. Gray, who served as a moderator for the session in which the study was presented.

In addition, “A unique aspect of this study was to examine how these medications are related to hospitalizations,” she said.

Given recent efforts to reduce use of potentially inappropriate medications in people with dementia, the increase in prevalence of use over the study period was surprising, especially for benzodiazepines, said Dr. Gray.

In clinical practice, “health care providers should continue to look for opportunities to deprescribe medications that may worsen cognition in people with dementia,” she said. However, more research is needed to examine trends in the years beyond 2015 for a more contemporary picture of medication use in this population, she noted.

The study received no outside funding. The researchers and Dr. Gray had no financial conflicts to disclose.

Medications that could have a negative effect on cognition are often used by older adults with dementia, according to data from approximately 13 million individuals presented at the annual meeting of the American Geriatrics Society.

Classes of medications including anticholinergics, antipsychotics, benzodiazepines, and non-benzodiazepine sedatives (Z drugs) have been identified as potentially inappropriate medications (PIMs) in patients with dementia, according to The American Geriatrics Society Beers Criteria for Potentially Inappropriate Medication Use in Older Adults.

The medications that could worsen dementia or cognition are known as CogPIMs, said presenting author Caroline M. Mak, a doctor of pharmacy candidate at the University at Buffalo School of Pharmacy and Pharmaceutical Sciences, New York.

Previous research has characterized the prevalence of use of CogPIMs, but data connecting use of CogPIMs and healthcare use are lacking, Ms. Mak said.

Ms. Mak and colleagues conducted a cross-sectional analysis of data from 2011 to 2015 from the Medical Expenditure Panel Survey (MEPS), a national survey with data on medication and healthcare use. The researchers included approximately 13 million survey respondents older than 65 years with dementia.

Exposure to CogPIMs was defined as filling a prescription for one or more of the CogPIMs during the study period. Population estimates of the prevalence of use of the CogPIMs were created using survey-weighted procedures, and prevalence trends were assessed using the Cochran-Armitage test.

Overall, the prevalence was 15.9%, 11.5%, 7.5%, and 3.8% for use of benzodiazepines, anticholinergics, antipsychotics, and Z drugs, respectively, during the study period.

Of these, benzodiazepines showed a significant trend with an increase in prevalence from 8.9% in 2011 to 16.4% in 2015 (P = .02).

The odds of hospitalization were more than twice as likely in individuals who reported using Z drugs (odds ratio, 2.57; P = .02) based on logistic regression. In addition, exposure to antipsychotics was significantly associated with an increased rate of hospitalization based on a binomial model for incidence rate ratio (IRR, 1.51; P = .02).

The findings were limited by several factors including the cross-sectional design, reliance on self-reports, and the lack of more recent data.

However, the results show that CogPIMs are often used by older adults with dementia, and antipsychotics and Z drugs could be targets for interventions to prevent harm from medication interactions and side effects, the researchers concluded.
 

Findings Highlight Need for Drug Awareness

The current study is important because of the expansion in the aging population and an increase in the number of patients with dementia, Ms. Mak said in an interview. “In both our older population and dementia patients, there are certain medication considerations that we need to take into account, and certain drugs that should be avoided if possible,” she said. Clinicians have been trying to use the Beers criteria to reduce potential medication harm, she noted. “One group of investigators (Hilmer et al.), has proposed a narrower focus on anticholinergic and sedative/hypnotic medication in the Drug Burden Index (DBI); the CogPIMs are a subset of both approaches (Beers and DBI) and represent a collection of medications that pose potential risks to our patients,” said Ms. Mak.

Continued reassessment is needed on appropriateness of anticholinergics, Z drugs, benzodiazepines, and antipsychotics in older patients with dementia, she added.

“Even though the only group to have a significant increase in prevalence [of use] was the benzodiazepine group, we didn’t see a decrease in any of the other groups,” said Ms. Mak. The current research provides a benchmark for CogPIMs use that can be monitored in the future for increases or, ideally, decreases, she said.
 

Part of a Bigger Picture

The current study is part of the work of Team Alice, a national deprescribing group affiliated with the University at Buffalo that was inspired by the tragic death of Alice Brennan, triggered by preventable medication harm, Ms. Mak said in an interview. “Team Alice consists of an array of academic, primary care, health plan, and regional health information partners that have designed patient-driven interventions to reduce medication harm, especially within primary care settings,” she said. “Their mission is to save people like Alice by pursuing multiple strategies to deprescribe unsafe medication, reduce harm, and foster successful aging. By characterizing the use of CogPIMs, we can design better intervention strategies,” she said.

Although Ms. Mak was not surprised by the emergence of benzodiazepines as the most commonly used drug groups, she was surprised by the increase during the study period.

“Unfortunately, our dataset was not rich enough to include reasons for this increase,” she said. In practice, “I have seen patients getting short-term, as needed, prescriptions for a benzodiazepine to address the anxiety and/or insomnia after the loss of a loved one; this may account for a small proportion of benzodiazepine use that appears to be inappropriate because of a lack of associated appropriate diagnosis,” she noted.

Also, the findings of increased hospitalization associated with Z drugs raises concerns, Ms. Mak said. Although the findings are consistent with other research, they illustrate the need for further investigation to identify strategies to prevent this harm, she said. “Not finding associations with hospitalization related to benzodiazepine or anticholinergics was a mild surprise,” Ms. Mak said in an interview. “However, while we know that these drugs can have a negative effect on older people, the effects may not have been severe enough to result in hospitalizations,” she said.

Looking ahead, Ms. Mak said she would like to see the study rerun with a more current data set, especially with regard to benzodiazepines and antipsychotics.
 

Seek Strategies to Reduce Medication Use

The current study was notable for its community-based population and attention to hospitalizations, Shelly Gray, PharmD, a professor of pharmacy at the University of Washington School of Pharmacy, said in an interview.

“Most studies examining potentially inappropriate medications that may impair cognition have been conducted in nursing homes, while this study focuses on community dwelling older adults where most people with dementia live,” said Dr. Gray, who served as a moderator for the session in which the study was presented.

In addition, “A unique aspect of this study was to examine how these medications are related to hospitalizations,” she said.

Given recent efforts to reduce use of potentially inappropriate medications in people with dementia, the increase in prevalence of use over the study period was surprising, especially for benzodiazepines, said Dr. Gray.

In clinical practice, “health care providers should continue to look for opportunities to deprescribe medications that may worsen cognition in people with dementia,” she said. However, more research is needed to examine trends in the years beyond 2015 for a more contemporary picture of medication use in this population, she noted.

The study received no outside funding. The researchers and Dr. Gray had no financial conflicts to disclose.

Medications that could have a negative effect on cognition are often used by older adults with dementia, according to data from approximately 13 million individuals presented at the annual meeting of the American Geriatrics Society.

Classes of medications including anticholinergics, antipsychotics, benzodiazepines, and non-benzodiazepine sedatives (Z drugs) have been identified as potentially inappropriate medications (PIMs) in patients with dementia, according to The American Geriatrics Society Beers Criteria for Potentially Inappropriate Medication Use in Older Adults.

The medications that could worsen dementia or cognition are known as CogPIMs, said presenting author Caroline M. Mak, a doctor of pharmacy candidate at the University at Buffalo School of Pharmacy and Pharmaceutical Sciences, New York.

Previous research has characterized the prevalence of use of CogPIMs, but data connecting use of CogPIMs and healthcare use are lacking, Ms. Mak said.

Ms. Mak and colleagues conducted a cross-sectional analysis of data from 2011 to 2015 from the Medical Expenditure Panel Survey (MEPS), a national survey with data on medication and healthcare use. The researchers included approximately 13 million survey respondents older than 65 years with dementia.

Exposure to CogPIMs was defined as filling a prescription for one or more of the CogPIMs during the study period. Population estimates of the prevalence of use of the CogPIMs were created using survey-weighted procedures, and prevalence trends were assessed using the Cochran-Armitage test.

Overall, the prevalence was 15.9%, 11.5%, 7.5%, and 3.8% for use of benzodiazepines, anticholinergics, antipsychotics, and Z drugs, respectively, during the study period.

Of these, benzodiazepines showed a significant trend with an increase in prevalence from 8.9% in 2011 to 16.4% in 2015 (P = .02).

The odds of hospitalization were more than twice as likely in individuals who reported using Z drugs (odds ratio, 2.57; P = .02) based on logistic regression. In addition, exposure to antipsychotics was significantly associated with an increased rate of hospitalization based on a binomial model for incidence rate ratio (IRR, 1.51; P = .02).

The findings were limited by several factors including the cross-sectional design, reliance on self-reports, and the lack of more recent data.

However, the results show that CogPIMs are often used by older adults with dementia, and antipsychotics and Z drugs could be targets for interventions to prevent harm from medication interactions and side effects, the researchers concluded.
 

Findings Highlight Need for Drug Awareness

The current study is important because of the expansion in the aging population and an increase in the number of patients with dementia, Ms. Mak said in an interview. “In both our older population and dementia patients, there are certain medication considerations that we need to take into account, and certain drugs that should be avoided if possible,” she said. Clinicians have been trying to use the Beers criteria to reduce potential medication harm, she noted. “One group of investigators (Hilmer et al.), has proposed a narrower focus on anticholinergic and sedative/hypnotic medication in the Drug Burden Index (DBI); the CogPIMs are a subset of both approaches (Beers and DBI) and represent a collection of medications that pose potential risks to our patients,” said Ms. Mak.

Continued reassessment is needed on appropriateness of anticholinergics, Z drugs, benzodiazepines, and antipsychotics in older patients with dementia, she added.

“Even though the only group to have a significant increase in prevalence [of use] was the benzodiazepine group, we didn’t see a decrease in any of the other groups,” said Ms. Mak. The current research provides a benchmark for CogPIMs use that can be monitored in the future for increases or, ideally, decreases, she said.
 

Part of a Bigger Picture

The current study is part of the work of Team Alice, a national deprescribing group affiliated with the University at Buffalo that was inspired by the tragic death of Alice Brennan, triggered by preventable medication harm, Ms. Mak said in an interview. “Team Alice consists of an array of academic, primary care, health plan, and regional health information partners that have designed patient-driven interventions to reduce medication harm, especially within primary care settings,” she said. “Their mission is to save people like Alice by pursuing multiple strategies to deprescribe unsafe medication, reduce harm, and foster successful aging. By characterizing the use of CogPIMs, we can design better intervention strategies,” she said.

Although Ms. Mak was not surprised by the emergence of benzodiazepines as the most commonly used drug groups, she was surprised by the increase during the study period.

“Unfortunately, our dataset was not rich enough to include reasons for this increase,” she said. In practice, “I have seen patients getting short-term, as needed, prescriptions for a benzodiazepine to address the anxiety and/or insomnia after the loss of a loved one; this may account for a small proportion of benzodiazepine use that appears to be inappropriate because of a lack of associated appropriate diagnosis,” she noted.

Also, the findings of increased hospitalization associated with Z drugs raises concerns, Ms. Mak said. Although the findings are consistent with other research, they illustrate the need for further investigation to identify strategies to prevent this harm, she said. “Not finding associations with hospitalization related to benzodiazepine or anticholinergics was a mild surprise,” Ms. Mak said in an interview. “However, while we know that these drugs can have a negative effect on older people, the effects may not have been severe enough to result in hospitalizations,” she said.

Looking ahead, Ms. Mak said she would like to see the study rerun with a more current data set, especially with regard to benzodiazepines and antipsychotics.
 

Seek Strategies to Reduce Medication Use

The current study was notable for its community-based population and attention to hospitalizations, Shelly Gray, PharmD, a professor of pharmacy at the University of Washington School of Pharmacy, said in an interview.

“Most studies examining potentially inappropriate medications that may impair cognition have been conducted in nursing homes, while this study focuses on community dwelling older adults where most people with dementia live,” said Dr. Gray, who served as a moderator for the session in which the study was presented.

In addition, “A unique aspect of this study was to examine how these medications are related to hospitalizations,” she said.

Given recent efforts to reduce use of potentially inappropriate medications in people with dementia, the increase in prevalence of use over the study period was surprising, especially for benzodiazepines, said Dr. Gray.

In clinical practice, “health care providers should continue to look for opportunities to deprescribe medications that may worsen cognition in people with dementia,” she said. However, more research is needed to examine trends in the years beyond 2015 for a more contemporary picture of medication use in this population, she noted.

The study received no outside funding. The researchers and Dr. Gray had no financial conflicts to disclose.

Having two copies of the APOE4 gene may be the genetic cause of up to one fifth of all Alzheimer’s disease cases, a new study suggests.

More than 95% of those with two copies of the gene (APOE4 homozygotes) in a large multicohort study had higher levels of Alzheimer’s disease biomarkers by age 55 years than did those with other APOE gene variants. By age 65 years, most had developed Alzheimer’s disease symptoms and showed abnormal amyloid levels in cerebrospinal fluid and on PET.

Investigators said that such a high penetrance of Alzheimer’s disease pathology in this group suggests that APOE4 may not be just a risk factor for Alzheimer’s disease but also a distinct genetic form of the disease. 

“Sometimes, we say we don’t know the cause of Alzheimer’s disease, but this would be behind 15%-20% of the population of people with Alzheimer’s disease,” lead investigator Juan Fortea, MD, PhD, director of the Memory Unit of the Neurology Department at the Hospital of Sant Pau, Barcelona, Spain, said at a press briefing.

Although some experts urge caution in interpreting these results, investigators and others say the findings, published online in Nature Medicine, could lead to calls for more widespread testing for APOE4 and may spur drug development.
 

High AD Penetrance

Mutations in the APP, PSEN1, and PSEN2 genes are linked to risk for early-onset autosomal-dominant Alzheimer’s disease, and dozens of other genes are associated with greater odds of late-onset disease. Among all these genes, APOE is considered the strongest genetic risk factor for late-onset Alzheimer’s disease. 

Prior studies found that APOE4 homozygotes have a 60% lifetime risk for Alzheimer’s disease by age 85 years, a risk higher than that found with other gene variants or in single APOE carriers or noncarriers. 

Despite that, no previous study had examined the predictability of symptom onset in APOE4 homozygotes, which make up about 2%-3% of the general population and 15-20% of those with Alzheimer’s disease. And because most biomarker studies have combined single- and double-carrier APOE4 carriers into one group, very little was known about the penetrance or disease progression in APOE4 homozygotes.

Investigators analyzed data from 3200 brain donors from the National Alzheimer’s Coordinating Center and more than 10,000 people with Alzheimer’s disease biomarkers from five multicenter cohorts in the United States and Europe.

Nearly all APOE4 homozygotes had either high or intermediate Alzheimer’s disease neuropathologic change scores compared with about 50% among APOE3 homozygotes and was the same regardless of age at time of death. 

Beginning at age 55 years, APOE4 homozygotes exhibited higher levels of abnormal Alzheimer’s disease biomarkers than did APOE3 homozygotes. By age 65 years, nearly everyone with two copies of APOE4 showed abnormal levels of amyloid in cerebrospinal fluid and 75% had positive amyloid scans. 

Other biomarkers showed a biologic penetrance of Alzheimer’s disease that increased with age. By age 80 years, penetrance for all amyloid and tau biomarkers reached 88%. 

Postmortem analysis revealed Alzheimer’s disease and dementia symptoms were evident in APOE4 homozygotes 7-10 years before APOE3 homozygotes, with Alzheimer’s disease symptoms present at age 65 years, minor cognitive impairment at 72 years, dementia at 74 years, and death at 77 years (P <.05 differences).

When they limited analysis to only those who developed Alzheimer’s disease dementia, investigators found no difference in amyloid or tau accumulation between APOE3 and APOE4 homozygotes. That was surprising given the much earlier presentation of clinical symptoms and biomarkers in those who carried two copies of APOE4.
 

More Than a Risk Factor

Overall, study findings provide evidence that APOE4 homozygotes represent another form of genetically determined Alzheimer’s disease, similar to autosomal-dominant Alzheimer’s disease and down syndrome-associated Alzheimer’s disease, investigators said.

“Our work showed that APOE4 homozygotes meet the three main characteristics of genetically determined Alzheimer’s disease, namely near-full penetrance, symptom onset predictability and a predictable sequence of biomarker and clinical changes,” they wrote. 

Based on the results, investigators recommend that future clinical trials avoid combining single and double APOE4 carriers into one study group. 

Because the global average proportion of APOE4 homozygotes is estimated to be approximately 2%, APOE4-homozygous Alzheimer’s disease may represent one of the most frequently occurring Mendelian diseases worldwide. This could have implications for genetic counseling and genetic screening recommendations, they said. 

“We may need to start treating these homozygotes as a separate group in our research so we can really understand the relation between amyloid and tau and symptoms in E4 homozygotes in a way that we have not been able to because of our practice in the field of thinking that APOE4 is this unitary risk effect,” co-investigator Sterling Johnson, PhD, professor of geriatrics and dementia, University of Wisconsin-Madison, said at a press briefing.

The findings may also have implications for Alzheimer’s disease prevention, investigators added.

“What’s particularly important is the promise that perhaps we could treat people before symptoms, particularly in people who already have the disease in their brain such as APOE4 homozygotes, which reliably predicts that they will have impairment and try to treat them beforehand,” co-investigator Reisa Sperling, MD, director of the Center for Alzheimer Research and Treatment at Brigham and Women›s Hospital and Massachusetts General Hospital, Boston, said at a press briefing. 

“This is important for preventing Alzheimer’s-related dementia and a real movement forward in defining the disease on the basis of genetics and biomarkers,” she added. 
 

Experts Offer Mixed Reactions

Commenting on the findings, Paul Mathews, MD, DPhil, group leader of the UK Dementia Research Institute Centre at Imperial College, said that the data point to a need to look at APOE4 differently. 

“One implication of this work is that testing for APOE4 gene homozygosity should be assessed for use clinically, when late middle-aged people present to their doctors with symptoms of dementia,” Dr. Mathews, who was not part of the study, said in a statement. 

In an accompany editorial, Yadong Huang, MD, PhD, Departments of Neurology and Pathology, University of California, San Francisco, and co-authors noted that the findings also have implications for clinical drug trials.

“So far, APOE4 homozygotes have not been treated as a separate predefined treatment group in clinical trials,” they wrote. “Following this study, APOE4 status must be recognized as a crucial parameter in trial design, patient recruitment and data analysis, with APOE4 homozygotes and heterozygotes being clearly separated. Such an approach may enhance the treatment efficacy and help tailor therapeutic interventions more effectively towards genetically defined patient populations.”

Other experts urge caution when interpreting the findings. 

“It is clear that APOE4 homozygosity is tightly linked to the appearance of Alzheimer’s-related pathology, but even at age 80, 12% of people with APOE4/E4 did not have amyloid/tau biomarkers,” said Yuko Hara, PhD, director of aging and Alzheimer’s disease prevention at the Alzheimer’s Drug Discovery Foundation. “Also, having two copies of APOE4 does not mean you will definitely develop symptoms of Alzheimer’s disease in your lifetime,” Dr. Hara added. 

Researchers have long known that APOE4 is a strong risk factor for Alzheimer’s disease and that people with two copies of the gene are at especially high risk, David Curtis, MD, PhD, Genetics Institute at University of College London, England, said in a statement.

“I do not see anything in this paper to justify the claim that carrying two copies of APOE4 represents some ‘distinct genetic form’ of Alzheimer’s disease,” Dr. Curtis said. “No matter how many alleles of APOE4 one carries, the underlying disease processes seem similar across cases of Alzheimer’s disease, suggesting that any effective treatment and prevention strategies, which have yet to be developed would have broad applicability.” 

Study funders included Fondo de Investigaciones Sanitario, Carlos III Health Institute, Fondo Europeo de Desarrollo Regional, Unión Europea, National Institutes of Health, the Department de Salut de la Generalitat de Catalunya, Horizon 2020–Research and Innovation Framework Programme from the European Union, La Caixa Foundation, EIT Digital, and the Alzheimer Association. Dr. Fortea reported receiving personal fees for service on the advisory boards, adjudication committees or speaker honoraria from AC Immune, Adamed, Alzheon, Biogen, Eisai, Esteve, Fujirebio, Ionis, Laboratorios Carnot, Life Molecular Imaging, Lilly, Lundbeck, Perha, Roche, and outside the submitted work. Dr. Johnson has served at scientific advisory boards for ALZPath, Enigma and Roche Diagnostics. Dr. Sperling has received personal consulting fees from AbbVie, AC Immune, Acumen, Alector, Bristol Myers Squibb, Janssen, Genentech, Ionis and Vaxxinity outside the submitted work. Dr. Huang is a co-founder and scientific advisory board member of GABAeron, Inc. Dr. Mathews reports consultancies with Sudo Biosciences, Nimbus, Redburn. Dr. Hara and Dr. Curtis reported no conflicts. Complete funding sources and disclosures are included in the original articles. 

A version of this article appeared on Medscape.com.

Having two copies of the APOE4 gene may be the genetic cause of up to one fifth of all Alzheimer’s disease cases, a new study suggests.

More than 95% of those with two copies of the gene (APOE4 homozygotes) in a large multicohort study had higher levels of Alzheimer’s disease biomarkers by age 55 years than did those with other APOE gene variants. By age 65 years, most had developed Alzheimer’s disease symptoms and showed abnormal amyloid levels in cerebrospinal fluid and on PET.

Investigators said that such a high penetrance of Alzheimer’s disease pathology in this group suggests that APOE4 may not be just a risk factor for Alzheimer’s disease but also a distinct genetic form of the disease. 

“Sometimes, we say we don’t know the cause of Alzheimer’s disease, but this would be behind 15%-20% of the population of people with Alzheimer’s disease,” lead investigator Juan Fortea, MD, PhD, director of the Memory Unit of the Neurology Department at the Hospital of Sant Pau, Barcelona, Spain, said at a press briefing.

Although some experts urge caution in interpreting these results, investigators and others say the findings, published online in Nature Medicine, could lead to calls for more widespread testing for APOE4 and may spur drug development.
 

High AD Penetrance

Mutations in the APP, PSEN1, and PSEN2 genes are linked to risk for early-onset autosomal-dominant Alzheimer’s disease, and dozens of other genes are associated with greater odds of late-onset disease. Among all these genes, APOE is considered the strongest genetic risk factor for late-onset Alzheimer’s disease. 

Prior studies found that APOE4 homozygotes have a 60% lifetime risk for Alzheimer’s disease by age 85 years, a risk higher than that found with other gene variants or in single APOE carriers or noncarriers. 

Despite that, no previous study had examined the predictability of symptom onset in APOE4 homozygotes, which make up about 2%-3% of the general population and 15-20% of those with Alzheimer’s disease. And because most biomarker studies have combined single- and double-carrier APOE4 carriers into one group, very little was known about the penetrance or disease progression in APOE4 homozygotes.

Investigators analyzed data from 3200 brain donors from the National Alzheimer’s Coordinating Center and more than 10,000 people with Alzheimer’s disease biomarkers from five multicenter cohorts in the United States and Europe.

Nearly all APOE4 homozygotes had either high or intermediate Alzheimer’s disease neuropathologic change scores compared with about 50% among APOE3 homozygotes and was the same regardless of age at time of death. 

Beginning at age 55 years, APOE4 homozygotes exhibited higher levels of abnormal Alzheimer’s disease biomarkers than did APOE3 homozygotes. By age 65 years, nearly everyone with two copies of APOE4 showed abnormal levels of amyloid in cerebrospinal fluid and 75% had positive amyloid scans. 

Other biomarkers showed a biologic penetrance of Alzheimer’s disease that increased with age. By age 80 years, penetrance for all amyloid and tau biomarkers reached 88%. 

Postmortem analysis revealed Alzheimer’s disease and dementia symptoms were evident in APOE4 homozygotes 7-10 years before APOE3 homozygotes, with Alzheimer’s disease symptoms present at age 65 years, minor cognitive impairment at 72 years, dementia at 74 years, and death at 77 years (P <.05 differences).

When they limited analysis to only those who developed Alzheimer’s disease dementia, investigators found no difference in amyloid or tau accumulation between APOE3 and APOE4 homozygotes. That was surprising given the much earlier presentation of clinical symptoms and biomarkers in those who carried two copies of APOE4.
 

More Than a Risk Factor

Overall, study findings provide evidence that APOE4 homozygotes represent another form of genetically determined Alzheimer’s disease, similar to autosomal-dominant Alzheimer’s disease and down syndrome-associated Alzheimer’s disease, investigators said.

“Our work showed that APOE4 homozygotes meet the three main characteristics of genetically determined Alzheimer’s disease, namely near-full penetrance, symptom onset predictability and a predictable sequence of biomarker and clinical changes,” they wrote. 

Based on the results, investigators recommend that future clinical trials avoid combining single and double APOE4 carriers into one study group. 

Because the global average proportion of APOE4 homozygotes is estimated to be approximately 2%, APOE4-homozygous Alzheimer’s disease may represent one of the most frequently occurring Mendelian diseases worldwide. This could have implications for genetic counseling and genetic screening recommendations, they said. 

“We may need to start treating these homozygotes as a separate group in our research so we can really understand the relation between amyloid and tau and symptoms in E4 homozygotes in a way that we have not been able to because of our practice in the field of thinking that APOE4 is this unitary risk effect,” co-investigator Sterling Johnson, PhD, professor of geriatrics and dementia, University of Wisconsin-Madison, said at a press briefing.

The findings may also have implications for Alzheimer’s disease prevention, investigators added.

“What’s particularly important is the promise that perhaps we could treat people before symptoms, particularly in people who already have the disease in their brain such as APOE4 homozygotes, which reliably predicts that they will have impairment and try to treat them beforehand,” co-investigator Reisa Sperling, MD, director of the Center for Alzheimer Research and Treatment at Brigham and Women›s Hospital and Massachusetts General Hospital, Boston, said at a press briefing. 

“This is important for preventing Alzheimer’s-related dementia and a real movement forward in defining the disease on the basis of genetics and biomarkers,” she added. 
 

Experts Offer Mixed Reactions

Commenting on the findings, Paul Mathews, MD, DPhil, group leader of the UK Dementia Research Institute Centre at Imperial College, said that the data point to a need to look at APOE4 differently. 

“One implication of this work is that testing for APOE4 gene homozygosity should be assessed for use clinically, when late middle-aged people present to their doctors with symptoms of dementia,” Dr. Mathews, who was not part of the study, said in a statement. 

In an accompany editorial, Yadong Huang, MD, PhD, Departments of Neurology and Pathology, University of California, San Francisco, and co-authors noted that the findings also have implications for clinical drug trials.

“So far, APOE4 homozygotes have not been treated as a separate predefined treatment group in clinical trials,” they wrote. “Following this study, APOE4 status must be recognized as a crucial parameter in trial design, patient recruitment and data analysis, with APOE4 homozygotes and heterozygotes being clearly separated. Such an approach may enhance the treatment efficacy and help tailor therapeutic interventions more effectively towards genetically defined patient populations.”

Other experts urge caution when interpreting the findings. 

“It is clear that APOE4 homozygosity is tightly linked to the appearance of Alzheimer’s-related pathology, but even at age 80, 12% of people with APOE4/E4 did not have amyloid/tau biomarkers,” said Yuko Hara, PhD, director of aging and Alzheimer’s disease prevention at the Alzheimer’s Drug Discovery Foundation. “Also, having two copies of APOE4 does not mean you will definitely develop symptoms of Alzheimer’s disease in your lifetime,” Dr. Hara added. 

Researchers have long known that APOE4 is a strong risk factor for Alzheimer’s disease and that people with two copies of the gene are at especially high risk, David Curtis, MD, PhD, Genetics Institute at University of College London, England, said in a statement.

“I do not see anything in this paper to justify the claim that carrying two copies of APOE4 represents some ‘distinct genetic form’ of Alzheimer’s disease,” Dr. Curtis said. “No matter how many alleles of APOE4 one carries, the underlying disease processes seem similar across cases of Alzheimer’s disease, suggesting that any effective treatment and prevention strategies, which have yet to be developed would have broad applicability.” 

Study funders included Fondo de Investigaciones Sanitario, Carlos III Health Institute, Fondo Europeo de Desarrollo Regional, Unión Europea, National Institutes of Health, the Department de Salut de la Generalitat de Catalunya, Horizon 2020–Research and Innovation Framework Programme from the European Union, La Caixa Foundation, EIT Digital, and the Alzheimer Association. Dr. Fortea reported receiving personal fees for service on the advisory boards, adjudication committees or speaker honoraria from AC Immune, Adamed, Alzheon, Biogen, Eisai, Esteve, Fujirebio, Ionis, Laboratorios Carnot, Life Molecular Imaging, Lilly, Lundbeck, Perha, Roche, and outside the submitted work. Dr. Johnson has served at scientific advisory boards for ALZPath, Enigma and Roche Diagnostics. Dr. Sperling has received personal consulting fees from AbbVie, AC Immune, Acumen, Alector, Bristol Myers Squibb, Janssen, Genentech, Ionis and Vaxxinity outside the submitted work. Dr. Huang is a co-founder and scientific advisory board member of GABAeron, Inc. Dr. Mathews reports consultancies with Sudo Biosciences, Nimbus, Redburn. Dr. Hara and Dr. Curtis reported no conflicts. Complete funding sources and disclosures are included in the original articles. 

A version of this article appeared on Medscape.com.

Having two copies of the APOE4 gene may be the genetic cause of up to one fifth of all Alzheimer’s disease cases, a new study suggests.

More than 95% of those with two copies of the gene (APOE4 homozygotes) in a large multicohort study had higher levels of Alzheimer’s disease biomarkers by age 55 years than did those with other APOE gene variants. By age 65 years, most had developed Alzheimer’s disease symptoms and showed abnormal amyloid levels in cerebrospinal fluid and on PET.

Investigators said that such a high penetrance of Alzheimer’s disease pathology in this group suggests that APOE4 may not be just a risk factor for Alzheimer’s disease but also a distinct genetic form of the disease. 

“Sometimes, we say we don’t know the cause of Alzheimer’s disease, but this would be behind 15%-20% of the population of people with Alzheimer’s disease,” lead investigator Juan Fortea, MD, PhD, director of the Memory Unit of the Neurology Department at the Hospital of Sant Pau, Barcelona, Spain, said at a press briefing.

Although some experts urge caution in interpreting these results, investigators and others say the findings, published online in Nature Medicine, could lead to calls for more widespread testing for APOE4 and may spur drug development.
 

High AD Penetrance

Mutations in the APP, PSEN1, and PSEN2 genes are linked to risk for early-onset autosomal-dominant Alzheimer’s disease, and dozens of other genes are associated with greater odds of late-onset disease. Among all these genes, APOE is considered the strongest genetic risk factor for late-onset Alzheimer’s disease. 

Prior studies found that APOE4 homozygotes have a 60% lifetime risk for Alzheimer’s disease by age 85 years, a risk higher than that found with other gene variants or in single APOE carriers or noncarriers. 

Despite that, no previous study had examined the predictability of symptom onset in APOE4 homozygotes, which make up about 2%-3% of the general population and 15-20% of those with Alzheimer’s disease. And because most biomarker studies have combined single- and double-carrier APOE4 carriers into one group, very little was known about the penetrance or disease progression in APOE4 homozygotes.

Investigators analyzed data from 3200 brain donors from the National Alzheimer’s Coordinating Center and more than 10,000 people with Alzheimer’s disease biomarkers from five multicenter cohorts in the United States and Europe.

Nearly all APOE4 homozygotes had either high or intermediate Alzheimer’s disease neuropathologic change scores compared with about 50% among APOE3 homozygotes and was the same regardless of age at time of death. 

Beginning at age 55 years, APOE4 homozygotes exhibited higher levels of abnormal Alzheimer’s disease biomarkers than did APOE3 homozygotes. By age 65 years, nearly everyone with two copies of APOE4 showed abnormal levels of amyloid in cerebrospinal fluid and 75% had positive amyloid scans. 

Other biomarkers showed a biologic penetrance of Alzheimer’s disease that increased with age. By age 80 years, penetrance for all amyloid and tau biomarkers reached 88%. 

Postmortem analysis revealed Alzheimer’s disease and dementia symptoms were evident in APOE4 homozygotes 7-10 years before APOE3 homozygotes, with Alzheimer’s disease symptoms present at age 65 years, minor cognitive impairment at 72 years, dementia at 74 years, and death at 77 years (P <.05 differences).

When they limited analysis to only those who developed Alzheimer’s disease dementia, investigators found no difference in amyloid or tau accumulation between APOE3 and APOE4 homozygotes. That was surprising given the much earlier presentation of clinical symptoms and biomarkers in those who carried two copies of APOE4.
 

More Than a Risk Factor

Overall, study findings provide evidence that APOE4 homozygotes represent another form of genetically determined Alzheimer’s disease, similar to autosomal-dominant Alzheimer’s disease and down syndrome-associated Alzheimer’s disease, investigators said.

“Our work showed that APOE4 homozygotes meet the three main characteristics of genetically determined Alzheimer’s disease, namely near-full penetrance, symptom onset predictability and a predictable sequence of biomarker and clinical changes,” they wrote. 

Based on the results, investigators recommend that future clinical trials avoid combining single and double APOE4 carriers into one study group. 

Because the global average proportion of APOE4 homozygotes is estimated to be approximately 2%, APOE4-homozygous Alzheimer’s disease may represent one of the most frequently occurring Mendelian diseases worldwide. This could have implications for genetic counseling and genetic screening recommendations, they said. 

“We may need to start treating these homozygotes as a separate group in our research so we can really understand the relation between amyloid and tau and symptoms in E4 homozygotes in a way that we have not been able to because of our practice in the field of thinking that APOE4 is this unitary risk effect,” co-investigator Sterling Johnson, PhD, professor of geriatrics and dementia, University of Wisconsin-Madison, said at a press briefing.

The findings may also have implications for Alzheimer’s disease prevention, investigators added.

“What’s particularly important is the promise that perhaps we could treat people before symptoms, particularly in people who already have the disease in their brain such as APOE4 homozygotes, which reliably predicts that they will have impairment and try to treat them beforehand,” co-investigator Reisa Sperling, MD, director of the Center for Alzheimer Research and Treatment at Brigham and Women›s Hospital and Massachusetts General Hospital, Boston, said at a press briefing. 

“This is important for preventing Alzheimer’s-related dementia and a real movement forward in defining the disease on the basis of genetics and biomarkers,” she added. 
 

Experts Offer Mixed Reactions

Commenting on the findings, Paul Mathews, MD, DPhil, group leader of the UK Dementia Research Institute Centre at Imperial College, said that the data point to a need to look at APOE4 differently. 

“One implication of this work is that testing for APOE4 gene homozygosity should be assessed for use clinically, when late middle-aged people present to their doctors with symptoms of dementia,” Dr. Mathews, who was not part of the study, said in a statement. 

In an accompany editorial, Yadong Huang, MD, PhD, Departments of Neurology and Pathology, University of California, San Francisco, and co-authors noted that the findings also have implications for clinical drug trials.

“So far, APOE4 homozygotes have not been treated as a separate predefined treatment group in clinical trials,” they wrote. “Following this study, APOE4 status must be recognized as a crucial parameter in trial design, patient recruitment and data analysis, with APOE4 homozygotes and heterozygotes being clearly separated. Such an approach may enhance the treatment efficacy and help tailor therapeutic interventions more effectively towards genetically defined patient populations.”

Other experts urge caution when interpreting the findings. 

“It is clear that APOE4 homozygosity is tightly linked to the appearance of Alzheimer’s-related pathology, but even at age 80, 12% of people with APOE4/E4 did not have amyloid/tau biomarkers,” said Yuko Hara, PhD, director of aging and Alzheimer’s disease prevention at the Alzheimer’s Drug Discovery Foundation. “Also, having two copies of APOE4 does not mean you will definitely develop symptoms of Alzheimer’s disease in your lifetime,” Dr. Hara added. 

Researchers have long known that APOE4 is a strong risk factor for Alzheimer’s disease and that people with two copies of the gene are at especially high risk, David Curtis, MD, PhD, Genetics Institute at University of College London, England, said in a statement.

“I do not see anything in this paper to justify the claim that carrying two copies of APOE4 represents some ‘distinct genetic form’ of Alzheimer’s disease,” Dr. Curtis said. “No matter how many alleles of APOE4 one carries, the underlying disease processes seem similar across cases of Alzheimer’s disease, suggesting that any effective treatment and prevention strategies, which have yet to be developed would have broad applicability.” 

Study funders included Fondo de Investigaciones Sanitario, Carlos III Health Institute, Fondo Europeo de Desarrollo Regional, Unión Europea, National Institutes of Health, the Department de Salut de la Generalitat de Catalunya, Horizon 2020–Research and Innovation Framework Programme from the European Union, La Caixa Foundation, EIT Digital, and the Alzheimer Association. Dr. Fortea reported receiving personal fees for service on the advisory boards, adjudication committees or speaker honoraria from AC Immune, Adamed, Alzheon, Biogen, Eisai, Esteve, Fujirebio, Ionis, Laboratorios Carnot, Life Molecular Imaging, Lilly, Lundbeck, Perha, Roche, and outside the submitted work. Dr. Johnson has served at scientific advisory boards for ALZPath, Enigma and Roche Diagnostics. Dr. Sperling has received personal consulting fees from AbbVie, AC Immune, Acumen, Alector, Bristol Myers Squibb, Janssen, Genentech, Ionis and Vaxxinity outside the submitted work. Dr. Huang is a co-founder and scientific advisory board member of GABAeron, Inc. Dr. Mathews reports consultancies with Sudo Biosciences, Nimbus, Redburn. Dr. Hara and Dr. Curtis reported no conflicts. Complete funding sources and disclosures are included in the original articles. 

A version of this article appeared on Medscape.com.

High olive oil consumption is associated with a significant decreased risk for dementia-related mortality, regardless of overall diet quality, a new study suggested.

Data from a prospective study of more than 92,000 people showed consuming at least 7 g of olive oil a day — about half a tablespoon — was associated with a 28% lower risk for dementia-related death.

Replacing one teaspoon of margarine and mayonnaise with the equivalent amount of olive oil was associated with an 8%-14% lower risk for dementia-related mortality.

“Opting for olive oil, a natural product, instead of more processed fats such as margarine and mayonnaise, is a safe choice and may reduce risk of fatal dementia,” said lead investigator Anne-Julie Tessier, RD, PhD, research associate, Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston.

However, “intervention studies are needed to confirm causal effect and optimal quantity of olive oil intake,” she added.

The study was published online in JAMA Network Open.
 

A Spoonful of Olive Oil

A growing body of evidence has shown a link between the Mediterranean diet and preserved cognitive function and lower risk for cardiovascular disease (CVD). But its association with dementia mortality was unknown.

Investigators analyzed data on over 92,000 participants (66% women; mean age, 56 years) in the Nurses’ Health Study (NHS) and Health Professionals Follow-Up Study (HPFS) who were free of CVD and cancer at baseline.

Both studies were conducted between 1990 and 2018, with olive oil intake assessed every 4 years using a food frequency questionnaire. Dementia-related mortality was ascertained from death records.

The researchers also evaluated the joint association of diet quality (particularly adherence to the Mediterranean diet and Alternative Healthy Eating Index score) and olive oil consumption with the risk for dementia-related mortality. And they estimated the difference in the risk for dementia-related mortality when other dietary fats were substituted with an equivalent amount of olive oil.

There were 4751 dementia-related deaths during the 28-year follow-up period. People with two copies of the apolipoprotein epsilon-4 (APOE epsilon-4) allele — a known risk factor for Alzheimer’s disease — had a fivefold to ninefold greater likelihood of dementia-related death.

Compared with no or rare olive oil intake, consumption of 7 g of olive oil or more per day was associated with a 28% lower risk for dementia-related mortality (adjusted hazard ratio [HR], 0.72; P < .001), after adjusting for lifestyle and socioeconomic factors. The finding remained consistent even with further adjustment for the APOE epsilon-4 allele.

Each 5-g increment in olive oil consumption had an inverse association with dementia-related death in women (HR, 0.88; 95% CI, 0.84-0.93) but not in men (HR, 0.96; 95% CI, 0.88-1.04).

No interaction by diet quality scores was found.
 

No Link With Diet Quality

“Typically, people who use olive oil for cooking or as a dressing have an overall better quality of their diet, but interestingly, we found the association between more olive oil and reduced risk of dementia-related death to be regardless of this factor,” Dr. Tessier said.

Replacing 5 g per day of margarine and mayonnaise with the equivalent amount of olive oil was associated with an 8%-14% lower risk for dementia mortality. Substitutions for other vegetable oils or butter were not significant.

“Some antioxidant compounds in olive oil can cross the blood-brain barrier, potentially having a direct effect on the brain,” Dr. Tessier said. “It is also possible that olive oil has an indirect effect on brain health by benefiting cardiovascular health.”

The authors noted several study limitations, including the possibility of reverse causation, due to the observational nature of the study.

It is also plausible that higher olive oil intake could be indicative of a healthier diet and higher socioeconomic status, although the results remained consistent after accounting these factors, the authors noted.

The study population included only healthcare professionals and was primarily non-Hispanic White people, which could limit generalizability.
 

Causality Versus Connection

Commenting on the findings, Rebecca M. Edelmayer, PhD, senior director of scientific engagement for the Alzheimer’s Association, cautioned that the study was designed to show correlation, not causation.

Other notable limitations include measuring prevalence or incidence of dementia from death records because dementia and Alzheimer’s disease are often underreported as a cause of death.

Moreover, people in the highest olive oil consumption group also had better diet quality, higher alcohol intake, were more physically active, and less likely to smoke, Dr. Edelmayer said.

“All of these factors may have an impact on risk of cognitive decline and dementia, separately from or in addition to olive oil consumption,” said Dr. Edelmayer, who was not involved with the study.

She echoed the authors’ concerns that the study was conducted in predominantly non-Hispanic White people and noted that the protective benefits of olive oil were no longer statistically significant for men after adjusting for potential confounders.

It “would be wonderful if a particular food could delay or prevent Alzheimer’s disease, but we do not have scientific evidence that these claims are true,” Dr. Edelmayer said. “We need randomized controlled clinical trials to evaluate whether any foods have a scientifically proven beneficial effect.”

This study is supported by a research grant from the National Institutes of Health to the senior author. The NHS, NHSII, and HPFS are supported by grants from the National Institutes of Health. Tessier is supported by the Canadian Institutes of Health Research Postdoctoral Fellowship Award. Senior author Guasch-Ferré is supported by a Novo Nordisk Foundation grant. Dr. Tessier reported no other relevant financial relationships. The other authors’ disclosures are listed on the original paper. Dr. Edelmayer reported no relevant financial relationships.

A version of this article appeared on Medscape.com.

High olive oil consumption is associated with a significant decreased risk for dementia-related mortality, regardless of overall diet quality, a new study suggested.

Data from a prospective study of more than 92,000 people showed consuming at least 7 g of olive oil a day — about half a tablespoon — was associated with a 28% lower risk for dementia-related death.

Replacing one teaspoon of margarine and mayonnaise with the equivalent amount of olive oil was associated with an 8%-14% lower risk for dementia-related mortality.

“Opting for olive oil, a natural product, instead of more processed fats such as margarine and mayonnaise, is a safe choice and may reduce risk of fatal dementia,” said lead investigator Anne-Julie Tessier, RD, PhD, research associate, Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston.

However, “intervention studies are needed to confirm causal effect and optimal quantity of olive oil intake,” she added.

The study was published online in JAMA Network Open.
 

A Spoonful of Olive Oil

A growing body of evidence has shown a link between the Mediterranean diet and preserved cognitive function and lower risk for cardiovascular disease (CVD). But its association with dementia mortality was unknown.

Investigators analyzed data on over 92,000 participants (66% women; mean age, 56 years) in the Nurses’ Health Study (NHS) and Health Professionals Follow-Up Study (HPFS) who were free of CVD and cancer at baseline.

Both studies were conducted between 1990 and 2018, with olive oil intake assessed every 4 years using a food frequency questionnaire. Dementia-related mortality was ascertained from death records.

The researchers also evaluated the joint association of diet quality (particularly adherence to the Mediterranean diet and Alternative Healthy Eating Index score) and olive oil consumption with the risk for dementia-related mortality. And they estimated the difference in the risk for dementia-related mortality when other dietary fats were substituted with an equivalent amount of olive oil.

There were 4751 dementia-related deaths during the 28-year follow-up period. People with two copies of the apolipoprotein epsilon-4 (APOE epsilon-4) allele — a known risk factor for Alzheimer’s disease — had a fivefold to ninefold greater likelihood of dementia-related death.

Compared with no or rare olive oil intake, consumption of 7 g of olive oil or more per day was associated with a 28% lower risk for dementia-related mortality (adjusted hazard ratio [HR], 0.72; P < .001), after adjusting for lifestyle and socioeconomic factors. The finding remained consistent even with further adjustment for the APOE epsilon-4 allele.

Each 5-g increment in olive oil consumption had an inverse association with dementia-related death in women (HR, 0.88; 95% CI, 0.84-0.93) but not in men (HR, 0.96; 95% CI, 0.88-1.04).

No interaction by diet quality scores was found.
 

No Link With Diet Quality

“Typically, people who use olive oil for cooking or as a dressing have an overall better quality of their diet, but interestingly, we found the association between more olive oil and reduced risk of dementia-related death to be regardless of this factor,” Dr. Tessier said.

Replacing 5 g per day of margarine and mayonnaise with the equivalent amount of olive oil was associated with an 8%-14% lower risk for dementia mortality. Substitutions for other vegetable oils or butter were not significant.

“Some antioxidant compounds in olive oil can cross the blood-brain barrier, potentially having a direct effect on the brain,” Dr. Tessier said. “It is also possible that olive oil has an indirect effect on brain health by benefiting cardiovascular health.”

The authors noted several study limitations, including the possibility of reverse causation, due to the observational nature of the study.

It is also plausible that higher olive oil intake could be indicative of a healthier diet and higher socioeconomic status, although the results remained consistent after accounting these factors, the authors noted.

The study population included only healthcare professionals and was primarily non-Hispanic White people, which could limit generalizability.
 

Causality Versus Connection

Commenting on the findings, Rebecca M. Edelmayer, PhD, senior director of scientific engagement for the Alzheimer’s Association, cautioned that the study was designed to show correlation, not causation.

Other notable limitations include measuring prevalence or incidence of dementia from death records because dementia and Alzheimer’s disease are often underreported as a cause of death.

Moreover, people in the highest olive oil consumption group also had better diet quality, higher alcohol intake, were more physically active, and less likely to smoke, Dr. Edelmayer said.

“All of these factors may have an impact on risk of cognitive decline and dementia, separately from or in addition to olive oil consumption,” said Dr. Edelmayer, who was not involved with the study.

She echoed the authors’ concerns that the study was conducted in predominantly non-Hispanic White people and noted that the protective benefits of olive oil were no longer statistically significant for men after adjusting for potential confounders.

It “would be wonderful if a particular food could delay or prevent Alzheimer’s disease, but we do not have scientific evidence that these claims are true,” Dr. Edelmayer said. “We need randomized controlled clinical trials to evaluate whether any foods have a scientifically proven beneficial effect.”

This study is supported by a research grant from the National Institutes of Health to the senior author. The NHS, NHSII, and HPFS are supported by grants from the National Institutes of Health. Tessier is supported by the Canadian Institutes of Health Research Postdoctoral Fellowship Award. Senior author Guasch-Ferré is supported by a Novo Nordisk Foundation grant. Dr. Tessier reported no other relevant financial relationships. The other authors’ disclosures are listed on the original paper. Dr. Edelmayer reported no relevant financial relationships.

A version of this article appeared on Medscape.com.

High olive oil consumption is associated with a significant decreased risk for dementia-related mortality, regardless of overall diet quality, a new study suggested.

Data from a prospective study of more than 92,000 people showed consuming at least 7 g of olive oil a day — about half a tablespoon — was associated with a 28% lower risk for dementia-related death.

Replacing one teaspoon of margarine and mayonnaise with the equivalent amount of olive oil was associated with an 8%-14% lower risk for dementia-related mortality.

“Opting for olive oil, a natural product, instead of more processed fats such as margarine and mayonnaise, is a safe choice and may reduce risk of fatal dementia,” said lead investigator Anne-Julie Tessier, RD, PhD, research associate, Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston.

However, “intervention studies are needed to confirm causal effect and optimal quantity of olive oil intake,” she added.

The study was published online in JAMA Network Open.
 

A Spoonful of Olive Oil

A growing body of evidence has shown a link between the Mediterranean diet and preserved cognitive function and lower risk for cardiovascular disease (CVD). But its association with dementia mortality was unknown.

Investigators analyzed data on over 92,000 participants (66% women; mean age, 56 years) in the Nurses’ Health Study (NHS) and Health Professionals Follow-Up Study (HPFS) who were free of CVD and cancer at baseline.

Both studies were conducted between 1990 and 2018, with olive oil intake assessed every 4 years using a food frequency questionnaire. Dementia-related mortality was ascertained from death records.

The researchers also evaluated the joint association of diet quality (particularly adherence to the Mediterranean diet and Alternative Healthy Eating Index score) and olive oil consumption with the risk for dementia-related mortality. And they estimated the difference in the risk for dementia-related mortality when other dietary fats were substituted with an equivalent amount of olive oil.

There were 4751 dementia-related deaths during the 28-year follow-up period. People with two copies of the apolipoprotein epsilon-4 (APOE epsilon-4) allele — a known risk factor for Alzheimer’s disease — had a fivefold to ninefold greater likelihood of dementia-related death.

Compared with no or rare olive oil intake, consumption of 7 g of olive oil or more per day was associated with a 28% lower risk for dementia-related mortality (adjusted hazard ratio [HR], 0.72; P < .001), after adjusting for lifestyle and socioeconomic factors. The finding remained consistent even with further adjustment for the APOE epsilon-4 allele.

Each 5-g increment in olive oil consumption had an inverse association with dementia-related death in women (HR, 0.88; 95% CI, 0.84-0.93) but not in men (HR, 0.96; 95% CI, 0.88-1.04).

No interaction by diet quality scores was found.
 

No Link With Diet Quality

“Typically, people who use olive oil for cooking or as a dressing have an overall better quality of their diet, but interestingly, we found the association between more olive oil and reduced risk of dementia-related death to be regardless of this factor,” Dr. Tessier said.

Replacing 5 g per day of margarine and mayonnaise with the equivalent amount of olive oil was associated with an 8%-14% lower risk for dementia mortality. Substitutions for other vegetable oils or butter were not significant.

“Some antioxidant compounds in olive oil can cross the blood-brain barrier, potentially having a direct effect on the brain,” Dr. Tessier said. “It is also possible that olive oil has an indirect effect on brain health by benefiting cardiovascular health.”

The authors noted several study limitations, including the possibility of reverse causation, due to the observational nature of the study.

It is also plausible that higher olive oil intake could be indicative of a healthier diet and higher socioeconomic status, although the results remained consistent after accounting these factors, the authors noted.

The study population included only healthcare professionals and was primarily non-Hispanic White people, which could limit generalizability.
 

Causality Versus Connection

Commenting on the findings, Rebecca M. Edelmayer, PhD, senior director of scientific engagement for the Alzheimer’s Association, cautioned that the study was designed to show correlation, not causation.

Other notable limitations include measuring prevalence or incidence of dementia from death records because dementia and Alzheimer’s disease are often underreported as a cause of death.

Moreover, people in the highest olive oil consumption group also had better diet quality, higher alcohol intake, were more physically active, and less likely to smoke, Dr. Edelmayer said.

“All of these factors may have an impact on risk of cognitive decline and dementia, separately from or in addition to olive oil consumption,” said Dr. Edelmayer, who was not involved with the study.

She echoed the authors’ concerns that the study was conducted in predominantly non-Hispanic White people and noted that the protective benefits of olive oil were no longer statistically significant for men after adjusting for potential confounders.

It “would be wonderful if a particular food could delay or prevent Alzheimer’s disease, but we do not have scientific evidence that these claims are true,” Dr. Edelmayer said. “We need randomized controlled clinical trials to evaluate whether any foods have a scientifically proven beneficial effect.”

This study is supported by a research grant from the National Institutes of Health to the senior author. The NHS, NHSII, and HPFS are supported by grants from the National Institutes of Health. Tessier is supported by the Canadian Institutes of Health Research Postdoctoral Fellowship Award. Senior author Guasch-Ferré is supported by a Novo Nordisk Foundation grant. Dr. Tessier reported no other relevant financial relationships. The other authors’ disclosures are listed on the original paper. Dr. Edelmayer reported no relevant financial relationships.

A version of this article appeared on Medscape.com.