Skip to main content

Research Repository

Advanced Search

Self-reported sleep duration and cognitive performance in older adults: A systematic review and meta-analysis

Lo, June C.; Groeger, John A.; Cheng, Grand H.; Dijk, Derk-Jan; Chee, Michael W. L.


June C. Lo

John A. Groeger

Grand H. Cheng

Derk-Jan Dijk

Michael W. L. Chee


Sleep is important for optimal cognitive functioning across the lifespan. Among older adults (≥ 55 years), self-reported short and long sleep durations have been repeatedly, albeit inconsistently, reported to elevate the risk for poor cognitive function. This meta-analytic review quantitatively summarizes the risk for poorer cognitive function among short and long sleepers in older adults. Eligible publications were searched online and manually. A total of 35 independent samples (N = 97,264) from 11 cross-sectional and seven prospective cohort studies were included. Pooled odds ratios (OR) with 95% confidence intervals (CI) were derived using random-effects models. Self-reported short and long sleep increased the odds for poor cognitive function by 1.40 (CI = 1.27–1.56) and 1.58 times (CI = 1.43–1.74), respectively. Effect sizes varied across studies and may have been moderated by both study type (cross-sectional and prospective) and cognitive domain assessed. For cross-sectional studies, extreme sleep durations were significantly associated with poorer multiple-domain performance, executive functions, verbal memory, and working memory capacity. Prospective cohort studies revealed significant long-term impact of short and long sleep on multiple-domain performance only. These findings establish self-reported extreme sleep duration as a risk factor for cognitive aging.


Lo, J. C., Groeger, J. A., Cheng, G. H., Dijk, D., & Chee, M. W. L. (2016). Self-reported sleep duration and cognitive performance in older adults: A systematic review and meta-analysis. Sleep medicine, 17, 87-98.

Journal Article Type Review
Acceptance Date Aug 8, 2015
Online Publication Date Sep 25, 2016
Publication Date Jan 1, 2016
Deposit Date Nov 6, 2015
Publicly Available Date Nov 23, 2017
Journal Sleep medicine
Print ISSN 1389-9457
Electronic ISSN 1878-5506
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 17
Pages 87-98
Keywords Sleep duration; Cognitive function; Older adults; Review; Meta-analysis
Public URL
Publisher URL
Additional Information This is an open access article published in Sleep Medicine, 2015.


You might also like

Downloadable Citations