Excessive sleep is associated with worse cognition, cognitive decline, and dementia in mild cognitive impairment.

ABSTRACT:

Introduction

This study examines the link between daytime and nighttime excessive sleep and cognition, cognitive decline, and dementia in individuals with existing mild cognitive impairment (MCI).

Methods

Using data from the Swedish longitudinal study Good Aging in Skåne, participants aged 60-102 years were retrospectively classified as MCI based on cognitive testing. The average follow-up time was 6.59 years. Mixed linear models assessed cross-sectional and longitudinal associations between excessive sleep patterns (napping ≥2 h or nighttime sleep ≥9 h) and multiple cognitive domains. Cox regressions estimated dementia risk for excessive sleep.

Results

Of 4930 participants, 2052 (41%) had MCI. Excessive daytime napping and nighttime sleep were associated with worse c

SUBMITTER: Overton M 

PROVIDER: S-EPMC11848587 | biostudies-literature | 2025 Jan-Mar

REPOSITORIES: biostudies-literature