Sleep duration and cognitive function among rural older adults in China: A population-based study
Year: 2025
Type: article
Study design: Observational Study
Abstract: BACKGROUND: Appropriate sleep duration is essential for maintaining normal cognitive function, but evidence is scarce in rural elderly population. This study aims to determine the associations between sleep duration and cognitive function among older adults in rural China. METHODS: This population-based cross-sectional study used data from the Confucius Hometown Aging Project in Shandong, China. Data on demographics, lifestyles, and chronic health conditions were collected through questionnaire surveys, clinical examinations, and laboratory tests. Sleep duration per day was classified into four groups (≤5 h, 6 h, 7 h, and ≥8 h). The Mini-Mental State Examination (MMSE) was used to assess the global and domain-specific cognitive function. Linear and logistic regressions were performed to determine the associations between sleep duration and cognitive function. RESULTS: Compared with 6 h sleep per day, sleep ≤5 h per day was associated with a higher odd of cognitive impairment with odds ratio (95% confident interval) being 1.70 (1.05, 2.74), but the association was attenuated and insignificant after the adjustment of covariates. Compared to those with 6 h sleep, individuals reporting short (≤5 h) or long (≥ 8 h) sleep duration per day had a lower MMSE score, and the adjusted β coefficient (95% confidence interval) was -0.36 (-0.71, -0.02) for sleep ≤5 h and -0.68 (-1.06, -0.30) for sleep ≥8 h. The patterns were similar for cognitive subdomains in orientation, attention and calculation. CONCLUSIONS: Our study showed that abnormal sleep duration was associated with poor cognitive function in older adults in China. Specifically, longer or shorter sleep duration was associated with lower cognitive function.
Source: PLoS ONE
Authors: Yongxu Fang, Zhongrui Yan, Xinglu Wang, Rui She, Peng Wang, Yajun Liang
Language: English
Topic: Sleep and related disorders
Subfield: Experimental and Cognitive Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: gold
Estimated APC paid: $2,382
Awards: Exploring the complex interplay between lifestyle factors, brain pathology, and cognitive reserve in cognitive decline and dementia, G4732589401, G5457862145, Time trends and determinants of disability in activities of daily living among elderly people in central Stockholm, 1987-2013, Sino-Sweden Research Network on Aging (Sino-Sweden RNA): Exploring the differential impacts of biomedical and environmental factors on cognitive aging across cultures
OpenAlex ID: W4415453966