ArticleJournal of Alzheimer's disease reports
Using machine learning to identify risk factors for Alzheimer's disease among older adults in the United States: The role of chronic and behavioral health.
Article in Journal of Alzheimer's disease reports. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: The interactions between behavioral disturbances, chronic diseases, and Alzheimer's disease (AD) risk are not fully understood, particularly in the context of the COVID-19 pandemic. Objective: This study aimed to identify key demographic, behavioral, and health-related predictors of AD using machine learning approaches. Methods: We conducted a cross-sectional analysis of 3257 participants from the National Health and Aging Trends Study (NHATS) and its COVID-19 supplement. Predictors included demographic, behavioral, and chronic disease variables, with self-reported physician-diagnosed AD as the outcome. LASSO and random forest (RF) models identified significant predictors, and regression tree analysis examined interactions to estimate individual AD risk profiles and subgroups. Results: Stroke, diabetes, osteoporosis, depression, and sleep disturbances emerged as key predictors of AD in both LASSO and RF models. Regression tree analysis identified three risk subgroups: a high-risk subgroup with a history of stroke and diabetes, showing a 68% AD risk among females; an intermediate-risk subgroup without stroke but with osteoporosis and positive COVID-19 status, showing a 30% risk; and a low-risk subgroup without stroke or osteoporosis, with the lowest risk (∼10%). Female patients with both stroke and diabetes had significantly higher AD risk than males (68% versus 10%, p = 0.029). Among patients without stroke but with osteoporosis, COVID-19 positivity increased AD risk by 20% (30% versus 10%, p = 0.006). Conclusions: Machine learning effectively delineates complex AD risk profiles, highlighting the roles of vascular and metabolic comorbidities and the modifying effects of sex, osteoporosis, and COVID-19. These insights support targeted screening and early intervention strategies to improve outcomes in older adults.
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