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Rest‐activity rhythms and cognitive impairment and dementia in older women: Results from the Women's Health Initiative

Growing evidence suggests that impairment in rest‐activity rhythms may be a risk factor for cognitive decline and impairment in the aging population. However, previous studies included only a limited set of rest‐activity metrics and produced mixed findings. We studied a comprehensive set of parametric and nonparametric characteristics of rest‐activity rhythms in relation to mild cognitive impairment (MCI) and probable dementia in a cohort of older women.