The longitudinal relationship between night-time sleep duration, midday napping, and frailty among middle-aged and older people in China: a prospective analysis.

ABSTRACT:

Background

Frailty is an important issue presented by ageing. Night-time sleep and midday napping are important modifiable factors influencing health, but their impacts on frailty remain unclear.

Methods

We used five waves of data from the China Health and Retirement Longitudinal Study (2011-20), with 15 333 participants in the baseline sample. We used fixed effects regression models to explore longitudinal relationships between night-time sleep duration, midday napping, and frailty index (FI). We added interaction terms of sleeping and napping to the regression model to explore their combined effects. We further used the Cox proportional regression model to quantify risks for frailty.

Results

Compared to sleeping seven to nine hours, sleeping <6 hours (FI = 0.016), s

SUBMITTER: Tang D 

PROVIDER: S-EPMC11869517 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature