Prolonged Nocturnal Sleep Duration as a Risk Factor for Cognitive Decline in Elderly Chinese Adults: A Post Hoc Cohort Analysis

This study identifies prolonged nocturnal sleep (≥9 hr) as an independent risk marker for cognitive decline in Chinese elderly. Clinicians should consider sleep pattern monitoring as part of dementia risk stratification strategies. Further investigation is warranted to determine whether sleep duration optimization could modify cognitive trajectories in at-risk populations.