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Background and objectivesThere are disparities in the prevalence of obesity by race, and the relationship between obesity and cognitive decline is unclear. The objective of this study was to determine whether obesity is independently associated with cognitive decline and whether the association between obesity and cognitive decline differs in Black and White adults. We hypothesized that obesity is associated with greater cognitive decline compared with normal weight and that the effect of obesity on cognitive decline is more pronounced in Black adults compared with their White counterparts.MethodsWe pooled data from 28,867 participants free of stroke and dementia (mean, SD: age 61 [10.7] years at the first cognitive assessment, 55% female, 24% Black, and 29% obese) from 6 cohorts. The primary outcome was the annual change in global cognition. We performed linear mixed-effects models with and without time-varying cumulative mean systolic blood pressure (SBP) and fasting plasma glucose (FPG). Global cognition was set to a t-score metric (mean 50, SD 10) at a participant's first cognitive assessment; a 1-point difference represents a 0.1 SD difference in global cognition across the 6 cohorts. The median follow-up was 6.5 years (25th percentile, 75th percentile: 5.03, 20.15).ResultsObese participants had lower baseline global cognition than normal-weight participants (difference in intercepts, -0.36 [95% CI, -0.46 to -0.17]; p < 0.001). This difference in baseline global cognition was attenuated but was borderline significant after accounting for SBP and FPG (adjusted differences in intercepts, -0.19 [95% CI, -0.39 to 0.002]; p = 0.05). There was no difference in the rate of decline in global cognition between obese and normal-weight participants (difference in slope, 0.009 points/year [95% CI, -0.009 to 0.03]; p = 0.32). After accounting for SBP and FPG, obese participants had a slower decline in global cognition (adjusted difference in slope, 0.03 points/year slower [95% CI, 0.01 to 0.05]; p < 0.001). There was no evidence that race modified the association between body mass index and global cognitive decline (p = 0.34).DiscussionThese results suggest that obesity is associated with lower initial cognitive scores and may potentially attenuate declines in cognition after accounting for BP and FPG.

BackgroundEthnic differences in cognitive decline have been reported. Whether they can be explained by differences in systolic blood pressure (SBP) is uncertain.ObjectiveDetermine whether cumulative mean SBP levels explain differences in cognitive decline between Hispanic and White individuals.MethodsPooled cohort study of individual participant data from six cohorts (1971-2017). The present study reports results on SBP and cognition among Hispanic and White individuals. Outcomes were changes in global cognition (GC) (primary), executive function (EF) (secondary), and memory standardized as t-scores (mean [SD], 50 [10]); a 1-point difference represents a 0.1 SD difference in cognition. Median follow-up was 7.7 (Q1-Q3, 5.2-20.1) years.ResultsWe included 24,570 participants free of stroke and dementia: 2,475 Hispanic individuals (median age, cumulative mean SBP at first cognitive assessment, 67 years, 132.5 mmHg; 40.8% men) and 22,095 White individuals (60 years,134 mmHg; 47.3% men). Hispanic individuals had slower declines in GC, EF, and memory than White individuals when all six cohorts were examined. Two cohorts recruited Hispanic individuals by design. In a sensitivity analysis, Hispanic individuals in these cohorts had faster decline in GC, similar decline in EF, and slower decline in memory than White individuals. Higher time-varying cumulative mean SBP was associated with faster declines in GC, EF, and memory in all analyses. After adjusting for time-varying cumulative mean SBP, differences in cognitive slopes between Hispanic and White individuals did not change.ConclusionWe found no evidence that cumulative mean SBP differences explained differences in cognitive decline between Hispanic and White individuals.

BackgroundMeta-analyses of individuals' cognitive data are increasing to investigate the biomedical, lifestyle, and sociocultural factors that influence cognitive decline and dementia risk. Pre-statistical harmonization of cognitive instruments is a critical methodological step for accurate cognitive data harmonization, yet specific approaches for this process are unclear.ObjectiveTo describe pre-statistical harmonization of cognitive instruments for an individual-level meta-analysis in the blood pressure and cognition (BP COG) study.MethodsWe identified cognitive instruments from six cohorts (the Atherosclerosis Risk in Communities Study, Cardiovascular Health Study, Coronary Artery Risk Development in Young Adults study, Framingham Offspring Study, Multi-Ethnic Study of Atherosclerosis, and Northern Manhattan Study) and conducted an extensive review of each item's administration and scoring procedures, and score distributions.ResultsWe included 153 cognitive instrument items from 34 instruments across the six cohorts. Of these items, 42%were common across ≥2 cohorts. 86%of common items showed differences across cohorts. We found administration, scoring, and coding differences for seemingly equivalent items. These differences corresponded to variability across cohorts in score distributions and ranges. We performed data augmentation to adjust for differences.ConclusionCross-cohort administration, scoring, and procedural differences for cognitive instruments are frequent and need to be assessed to address potential impact on meta-analyses and cognitive data interpretation. Detecting and accounting for these differences is critical for accurate attributions of cognitive health across cohort studies.

The impact of the COVID-19 pandemic on informal caregiving was examined in a Mexican American (MA) and Non-Hispanic White (NHW) population-based cohort. 395 participants age > 65 years were recruited via door-to-door and phone recruitment as part of the Brain Attack Surveillance in Corpus Christi-Cognitive (BASIC-C) project. Both recipients and caregivers answered questions regarding the recipient's health and the COVID-19 pandemic. 15% of caregivers saw their caregiving recipient less than before the pandemic and 18% saw their recipient more than before. 55% of caregivers reported a slight to severe impact of the pandemic on their caregiving, and 45% reported no impact. For most caregivers, their caregiving role did not change markedly during the pandemic. MA and NHW caregivers had similar survey responses. [ABSTRACT FROM AUTHOR]

Strategies to prevent or delay Alzheimer's disease and related dementias (AD/ADRD) are urgently needed, and blood pressure (BP) management is a promising strategy. Yet the effects of different BP control strategies across the life course on AD/ADRD are unknown. Randomized trials may be infeasible due to prolonged follow-up and large sample sizes. Simulation analysis is a practical approach to estimating these effects using the best available existing data. However, existing simulation frameworks cannot estimate the effects of BP control on both dementia and cardiovascular disease. This manuscript describes the design principles, implementation details, and population-level validation of a novel population-health microsimulation framework, the MIchigan ChROnic Disease SIMulation (MICROSIM), for The Effect of Lower Blood Pressure over the Life Course on Late-life Cognition in Blacks, Hispanics, and Whites (BP-COG) study of the effect of BP levels over the life course on dementia and cardiovascular disease. MICROSIM is an agent-based Monte Carlo simulation designed using computer programming best practices. MICROSIM estimates annual vascular risk factor levels and transition probabilities in all-cause dementia, stroke, myocardial infarction, and mortality in a nationally representative sample of US adults 18+ using the National Health and Nutrition Examination Survey (NHANES). MICROSIM models changes in risk factors over time, cognition and dementia using changes from a pooled dataset of individual participant data from 6 US prospective cardiovascular cohort studies. Cardiovascular risks were estimated using a widely used risk model and BP treatment effects were derived from meta-analyses of randomized trials. MICROSIM is an extensible, open-source framework designed to estimate the population-level impact of different BP management strategies and reproduces US population-level estimates of BP and other vascular risk factors levels, their change over time, and incident all-cause dementia, stroke, myocardial infarction, and mortality. [ABSTRACT FROM AUTHOR]

The Harmonized Cognitive Assessment Protocol (HCAP) is a major innovation that provides, for the first time, harmonized data for cross‐national comparisons of later‐life cognitive functions that are sensitive to linguistic, cultural, and educational differences across countries. However, cognitive function does not lend itself to direct comparison across diverse populations without careful consideration of the best practices for such comparisons. This perspective discusses theoretical and methodological considerations and offers a set of recommended best practices for conducting cross‐national comparisons of risk factor associations using HCAP data. Because existing and planned HCAP studies provide cognition data representing an estimated 75% of the global population ≥65 years of age, these recommended best practices will support high‐quality comparative analyses of cognitive aging around the world. The principles described in this perspective are applicable to any researcher aiming to integrate or compare harmonized data on cognitive outcomes and their risk and protective factors across diverse populations. [ABSTRACT FROM AUTHOR]

The Dementia Risk Prediction Project (DRPP) is a collaborative effort that brings together data from 16 longitudinal cohorts of diverse middle-aged and older adults to study dementia and its risk factors. The project aims to develop a dynamic dementia risk prediction model. The cohorts include participants from multiple countries and have baseline exams ranging from 1948 to 2006. The DRPP provides access to harmonized individual-level data for over 95,000 individuals. The project was established to address the increasing prevalence of dementia and the need for comprehensive risk assessment and preventive interventions. The article discusses the Dementia Risk Prediction Project (DRPP), which is a consortium of 16 different cohort studies from various countries, including the USA, France, Iceland, England, and the Netherlands. These studies have collected data on risk factors for dementia, stroke, coronary heart disease, and cardiovascular disease. The DRPP has harmonized and analyzed the data from these studies to identify common variables and trends related to these diseases. The consortium includes over 119,000 individuals with baseline data, and the follow-up time ranges from 1948 to 2020. The DRPP has identified thousands of incident cases of dementia, stroke, coronary heart disease, and cardiovascular disease. The consortium's findings provide valuable insights into the risk factors and trends associated with these diseases. The given document includes tables and graphs that provide demographic and health data from various studies. The tables show the total number of participants, their age, sex, race/ethnic [Extracted from the article]

Background: Little information is available on the prevalence of cognitive impairment in Mexican American persons. Objective: To determine the prevalence of mild cognitive impairment (MCI) and dementia in those 65 years and older among Mexican American and non-Hispanic white individuals in a community. Methods: This was a population-based cohort study in Nueces County, Texas, USA. Participants were recruited using a random housing sample. The Harmonized Cognitive Assessment (HCAP) participant and informant protocol was performed after Montreal Cognitive Assessment (MoCA) screening. An algorithm was used to sort participants into diagnostic categories: no cognitive impairment, MCI, or dementia. Logistic regression determined the association of ethnicity with MCI and dementia controlling for age, gender, and education. Results: 1,901 participants completed the MoCA and 547 the HCAP. Mexican Americans were younger and had less educational attainment than non-Hispanic whites. Overall, dementia prevalence was 11.6% (95% CI 9.2–14.0) and MCI prevalence was 21.2% (95% CI 17.5–24.8). After adjusting for age, gender, and education level, there was no significant ethnic difference in the odds of dementia or MCI. Those with ≤11 compared with ≥16 years of education had much higher dementia [OR = 4.9 (95% CI 2.2–11.1)] and MCI risk [OR = 3.5 (95% CI 1.6–7.5)]. Conclusions: Dementia and MCI prevalence were high in both Mexican American and non-Hispanic white populations. Mexican American persons had double the odds of mild cognitive impairment and this was attenuated when age and educational attainment were considered. Educational attainment was a potent predictor of cognitive impairment. [ABSTRACT FROM AUTHOR]

Background: Individuals with Alzheimer's disease and Alzheimer's disease‐related dementias may lose the ability to drive safely as their disease progresses. Little is known about driving prevalence in older Latinx and non‐Hispanic White (NHW) individuals. We investigated the prevalence of driving status among individuals with cognitive impairment in a population‐based cohort. Methods: This was a cross‐sectional analysis of the cohort BASIC‐Cognitive study in a community of Mexican American (MA) and NHW individuals in South Texas. Participants scored ≤25 on the Montreal Cognitive Assessment (MoCA), indicating a likelihood of cognitive impairment. Current driving status was assessed by the Harmonized Cognitive Assessment Protocol informant interview. Logistic regression was used to assess driving versus non‐driving adjusted for pre‐specified covariates. Chi‐square and Mann–Whitney U tests were used to compare NHW and MA differences in driving outcomes from the American Academy of Neurology (AAN) questions for evaluating driving risk in dementia. Results: There were 635 participants, 77.0 mean age, 62.4% women, and 17.3 mean MoCA. Of these, 360 (61.4%) were current drivers with 250 of 411 (60.8%) MA participants driving, and 121 of 190 (63.70%) NHW participants driving (p = 0.50). In fully adjusted models age, sex, cognitive impairment, language preference, and Activities of Daily Living scores were significant predictors for the likelihood of driving (p < 0.0001). Severity of cognitive impairment was inversely associated with odds of driving, but this relationship was not found in those preferring Spanish language for interviews. Around one‐third of all caregivers had concerns about their care‐recipient driving. There were no significant differences in MA and NHW driving habits and outcomes from the AAN questionnaire. Conclusions: The majority of participants with cognitive impairment were currently driving. This is a cause for concern for many caregivers. There were no significant ethnic driving differences. Associations with current driving in cognitively impaired persons require further research. [ABSTRACT FROM AUTHOR]

Objective: This study assessed patient‐reported outcomes (PROs) in individuals with persistently positive antiphospholipid antibodies (aPL) to better understand how living with aPL may affect their quality of life. Methods: Patients completed Patient‐Reported Outcomes Measurement Information System Physical Function (PF) and Cognitive Function (CF) Short Forms as well as the pain intensity (PI) rating (scale of 1‐10). Patients were characterized for demographics, clinical manifestations of antiphospholipid syndrome (APS), cardiovascular risk factors, laboratory test results, and medication usage. Multivariate modeling was done via linear regression. Results: Of 139 patients, 89 had primary APS, 21 had secondary APS, and 29 had persistent aPL without meeting clinical criteria for APS. The average T scores (±SD) for PF and CF were 45.4 ± 9.2 and 48.6 ± 11.6, respectively; the average for PI was 3.0 ± 2.6. Approximately half of the patients (47%) endorsed at least mild impairment in PF (T score < 45). Mean PF, CF, and PI did not differ between diagnostic groups. Individuals who endorsed more impairment on one measure also tended to endorse more impairment on another (Pearson r = 0.43‐0.59). In the multivariate models, age, smoking, pain medications, and serotonergic medications were associated with impairment in at least one PRO domain. The Damage Index for APS was significantly correlated with both PF and CF. Conclusion: Individuals living with APS endorsed more impairment in PF (and potentially CF) than expected for the general population. The relationship between certain medications and PROs warrants further study, as does the longitudinal trajectory of these and other PROs. [ABSTRACT FROM AUTHOR]

Mexican Americans (MA) are more likely to have cognitive impairment and dementia (CID), be diagnosed at an earlier age and live with CID longer, compared to non-Hispanic Whites (NHW). While studies have examined unmet needs of individuals with CID and their caregivers, few have focused on MA populations in the U.S. This paper examines the needs of community-residing individuals with CID and their caregivers in Nueces County, Texas, a county with one of the largest MA populations in the U.S., while exploring ethnic differences in needs identified. Using concept mapping, a mixed-method approach, qualitative input on perceived needs by informal caregivers and health professionals was collected. Participants then sorted and rated perceived needs. Using this information, multidimensional scaling and cluster analyses were conducted to map the relationship between perceived needs and determine their importance and priority. Five clusters were derived for caregivers and four for the health professionals. Themes across both caregivers and health professionals highlighted the need for specialized and team-based medical care, caregiver support and training, along with socio-economic and physical needs that help with day-to-day care of individuals with CID. Among caregivers, MA rated financial resources as more important and of higher priority compared to NHW. The health professionals' perspectives were aligned with those of all caregivers. By understanding the needs of caregivers and individuals with CID, we can help families deal with this disease and let caregivers thrive. This is especially important for minority populations like MAs. [ABSTRACT FROM AUTHOR]

Objectives: We compared the concurrent validity of the Montreal Cognitive Assessment (MoCA) with other cognitive screening instruments among Mexican Americans (MA) and non-Hispanic whites (NHW). Methods: In a community-based study in Nueces county, Texas (5/2/18-2/26/20), participants 65+ with MoCA ≤25 completed the Harmonized Cognitive Assessment Protocol. Regressions examined associations between MoCA and: 1) Mini Mental State Examination (MMSE); 2) abbreviated Community Screening Interview for Dementia (CSI-D); 3) Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE). Results: MA (n = 229) and NHW (n = 81) differed by education but not age or sex. MoCA and cognitive performance associations (MMSE, CSI-D-Respondent) did not differ between MA and NHW (p's >.16). MoCA and informant rating associations (IQCODE, CSI-D-Informant) were stronger in NHW than MA (NHW R2 = 0.39 and 0.38, respectively; MA R2 = 0.30 and 0.28, respectively). Discussion: Our findings suggest non-equivalence across cognitive screening instruments among MAs and NHWs. [ABSTRACT FROM AUTHOR]