Health Disparities in Cognitive Impairment and Dementia: Role of Social Strain, Depression, and C-Reactive Protein.

We investigated the association of social strain from friends, depression, and systemic inflammation (C-Reactive Protein [CRP]) with cognitive impairment without dementia (CIND) and dementia among 9,262 participants (age ≥ 65). We analyzed data from the Health Retirement Study (HRS), performing Chi-squared and logistic regression analyses. Measures included the 27-point HRS cognition scale, social strain scale, Center for Epidemiological Studies Depression scale, and dried-blood CRP levels. Black and Hispanic participants had a significantly increased dementia risk (OR = 2.69 and OR = 2.54). Black participants also had a high risk of CIND (OR = 2.80), but no association of Hispanic participants with CIND. Increased social strain from friends and depression were significantly associated with CIND (OR = 1.50 and OR = 1.44) and dementia (OR = 1.57 and OR = 1.78). Elevated CRP levels were only linked to CIND risk (OR = 1.03), not dementia. Early detection and interventions targeting social strain, depression, and CRP levels may help promote cognitive functioning in older adults.

Breast and prostate cancer screening rates by cognitive status in US older adults.

INTRODUCTION: For most older adults with dementia, the short-term harms and burdens of routine cancer screening likely outweigh the delayed benefits. We aimed to provide a more updated assessment of the extent that US older adults with dementia receive breast and prostate cancer screenings. METHODS: Using the Health and Retirement Study (HRS) Wave 12 (2014-2015) linked to Medicare, we examine rates of breast and prostate cancer screenings in adults 65+ years by cognitive status. We used claims data to identify eligibility for screening and receipt of screening. We used a validated method using HRS data to define cognitive status. RESULTS: The analytic sample included 2439 women in the breast cancer screening cohort and 1846 men in the prostate cancer screening cohort. Average ages were 76.8 years for women and 75.6 years for men, with 9.0% and 7.6% with dementia in each cohort, respectively. Among women with dementia, 12.3% were screened for breast cancer. When stratified by age, 10.6% of those 75+ and have dementia were screened for breast cancer. When stratified by predicted life expectancy, 10.4% of those with predicted life expectancy of <10 years and have dementia were screened for breast cancer. Among men with dementia, 33.9% were screened for prostate cancer. When stratified by age, 30.9% of those 75+ and have dementia were screened for prostate cancer. When stratified by predicted life expectancy, 34.4% of those with predicted life expectancy of <10 years and have dementia were screened for prostate cancer. Using multivariable logistic regression, dementia was associated with lower odds of receiving breast cancer screening (OR 0.36, 95% CI 0.23-0.57) and prostate cancer screening (OR 0.58, 95% CI 0.36-0.96). DISCUSSION: Our results suggest potential over-screening in older adults with dementia. Better supporting dementia patients and caregivers to make informed cancer screening decisions is critical.

Social isolation and 9-year dementia risk in community-dwelling Medicare beneficiaries in the United States.

BACKGROUND: Social isolation can influence whether older adults develop dementia. We examine the association between social isolation and incident dementia among older adults in a nationally representative sample of community dwelling older adults in the United States (U.S.). We also investigate whether this association varies by race and ethnicity. METHODS: Data (N = 5022) come from the National Health and Aging Trends Study, a longitudinal and nationally representative cohort of older adults in the U.S. A composite measure of social isolation was used to classify older adults as socially isolated or not socially isolated at baseline. Demographic and health factors were measured at baseline via self-report. Dementia was measured at each round of data collection. Discrete-time proportional hazard time-to-event models were used to assess the association between social isolation and incident dementia over 9 years (2011-2020). RESULTS: Of 5022 older adults, 1172 (23.3%) were socially isolated, and 3850 (76.7%) were not socially isolated. Adjusting for demographic and health factors, being socially isolated (vs. not socially isolated) was associated with a 1.28 (95% CI: 1.10-1.49) higher hazard of incident dementia over 9 years. There was no statistically significant difference by race and ethnicity. CONCLUSION: Social isolation among older adults is associated with greater dementia risk. Elucidating the pathway by which social isolation impacts dementia may offer meaningful insights for the development of novel solutions to prevent or ameliorate dementia across diverse racial and ethnic groups.

Differential race effects of the tailored activity program (TAP) on dementia-related behaviors: A randomized controlled trial.

BACKGROUND: Although nonpharmacological approaches are considered first-line treatments for dementia-related behaviors, it is unclear as to their effectiveness for different racial groups. We evaluated the effects of the Tailored Activity Program (TAP) on agitated and aggressive behaviors in Black and White families. METHODS: We conducted a single-blind, two-arm randomized controlled trial involving Black (N = 90) and White (N = 145) families. TAP involved eight home sessions by occupational therapists who provided activities tailored to abilities and interests and instructed caregivers in their use over 3 months. An attention control group received eight sessions by research assistants who provided disease education and home safety tips. Measures included caregiver ratings of frequency by severity for the agitation and aggression subscales of the Neuropsychiatric Inventory-Clinician (NPI-C) at 3 months (main trial primary outcome), number of completed sessions and time spent, changes in behavioral subcomponents of the subscales (frequency, severity, caregiver distress), and percent improving/worsening. RESULTS: Black and White families completed similar numbers of treatment sessions, but White dyads averaged nearly two contact hours more than Black dyads (p = 0.008). At 3 months, an interaction effect (treatment by race) indicated significantly greater reductions in frequency by severity scores for the agitation and aggression subscales for Black TAP dyads versus White TAP dyads and White and Black attention control dyads. Also, significant interaction effects favoring TAP Black dyads were observed for select behavioral components. For TAP dyads with elevated baseline agitation/aggression levels (N = 71), 34.5% of Black versus 11.9% of White dyads improved; whereas 2.6% of Black versus 16.7% of White dyads had worsened agitation/aggression scores. CONCLUSION: Black families compared to White families derived greater behavioral benefits from TAP for PLWD at 3 months despite having less treatment exposure. Examining differential race effects may enhance precision in using nonpharmacological approaches and promote equity in dementia care for underserved populations.

Sleep Quality Reports From Family Caregivers and Matched Non-caregiving Controls in a Population-Based Study.

The stress of family caregiving may affect many health-related variables, including sleep. We evaluated differences in self-reported sleep quality between incident caregivers and matched non-caregiving controls from a national population-based study. Caregivers and controls were identified in the Reasons for Geographic and Racial Differences in Stroke (REGARDS) study and matched on seven different demographic and health history factors. Caregivers reported significantly longer sleep onset latency than controls, before and after adjusting for covariates (ps < .05). No differences were found on measures of total sleep time or sleep efficiency. Among caregivers only, employed persons reported less total sleep time and number of care hours was a significant predictor of total sleep time. Dementia caregivers did not differ from other caregivers. This is one of the few population-based studies of sleep quality in family caregivers. Additional research is needed to examine whether sleep disturbance contributes to greater health problems among caregivers.