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Int J Biol Sci 2017; 13(6):682-689. doi:10.7150/ijbs.19695

Research Paper

Sleep Duration and Patterns in Chinese Older Adults: a Comprehensive Meta-analysis

Li Lu1*, Shi-Bin Wang1, 2*, Wen-Wang Rao3*, Gabor S. Ungvari4, 5, Chee H. Ng6, Helen F.K. Chiu7, Juan Zhang8, Changgui Kou3, Fu-Jun Jia2✉, Yu-Tao Xiang1✉

1. Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China;
2. Guangdong Mental Health Center, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China;
3. Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China;
4. University of Notre Dame Australia / Marian Centre, Perth, Australia;
5. School of Psychiatry & Clinical Neurosciences, University of Western Australia, Perth, Australia;
6. Department of Psychiatry, University of Melbourne, Melbourne, Victoria, Australia;
7. Department of Psychiatry, Chinese University of Hong Kong, Hong Kong SAR, China;
8. Faculty of Education, University of Macau, Macao SAR, China.
* These authors contributed equally to the work.


This meta-analysis examined the mean sleep duration and patterns in Chinese older adult population. A literature search was systematically conducted covering major English (PubMed, Embase and PsycINFO) and Chinese (Chinese National Knowledge Infrastructure (CNKI), WanFang and SinoMed) databases. Data in studies with the mean and standard deviation of sleep duration and/or the proportion of short and long sleep durations in Chinese older adults were extracted and pooled using random-effects models. Subgroup analyses were conducted according to gender, region, area, survey time and sample size. A total of 36 studies with 150,616 subjects were included for analyses. The pooled mean sleep duration of 21 studies with available data was 6.82 hours/day (95% CI: 6.59-7.05 hours/day). The estimated proportions of sleep duration <5 hours/day, <6 hours/day, <7 hours/day were 18.8% (95% CI: 1.7%-35.9%), 26.7% (95% CI: 19.7%-33.7%) and 42.3% (95% CI: 34.8%-49.8%), respectively. The pooled proportions for long sleepers were 22.6% (95% CI: 13.9%-31.4%) (>8 hours/day) and 17.6% (95% CI: 12.4%-22.9%) (>9 hours/day). Given the adverse effects of unhealthy sleep patterns, health professionals should pay more attention to sleep patterns in this population in China.

Keywords: Sleep duration, old adult, meta-analysis, China.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license ( See for full terms and conditions.
How to cite this article:
Lu L, Wang SB, Rao WW, Ungvari GS, Ng CH, Chiu HFK, Zhang J, Kou C, Jia FJ, Xiang YT. Sleep Duration and Patterns in Chinese Older Adults: a Comprehensive Meta-analysis. Int J Biol Sci 2017; 13(6):682-689. doi:10.7150/ijbs.19695. Available from