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Meta-Analysis
. 2017 Feb 24;12(2):e0170772.
doi: 10.1371/journal.pone.0170772. eCollection 2017.

The prevalence of insomnia in the general population in China: A meta-analysis

Xiao-Lan Cao  1   2 , Shi-Bin Wang  3 , Bao-Liang Zhong  4 , Ling Zhang  5 , Gabor S Ungvari  6   7 , Chee H Ng  8 , Lu Li  3 , Helen F K Chiu  9 , Grace K I Lok  3   10 , Jian-Ping Lu  1 , Fu-Jun Jia  11 , Yu-Tao Xiang  3
Affiliations
Meta-Analysis

The prevalence of insomnia in the general population in China: A meta-analysis

Xiao-Lan Cao et al. PLoS One. .

Abstract

This is the first meta-analysis of the pooled prevalence of insomnia in the general population of China. A systematic literature search was conducted via the following databases: PubMed, PsycINFO, EMBASE and Chinese databases (China National Knowledge Interne (CNKI), WanFang Data and SinoMed). Statistical analyses were performed using the Comprehensive Meta-Analysis program. A total of 17 studies with 115,988 participants met the inclusion criteria for the analysis. The pooled prevalence of insomnia in China was 15.0% (95% Confidence interval [CI]: 12.1%-18.5%). No significant difference was found in the prevalence between genders or across time period. The pooled prevalence of insomnia in population with a mean age of 43.7 years and older (11.6%; 95% CI: 7.5%-17.6%) was significantly lower than in those with a mean age younger than 43.7 years (20.4%; 95% CI: 14.2%-28.2%). The prevalence of insomnia was significantly affected by the type of assessment tools (Q = 14.1, P = 0.001). The general population prevalence of insomnia in China is lower than those reported in Western countries but similar to those in Asian countries. Younger Chinese adults appear to suffer from more insomnia than older adults.

Trial registration: CRD 42016043620.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. PRISMA flow diagram.
Fig 2
Fig 2. Point prevalence of insomnia in Chinese general population.
Fig 3
Fig 3. Funnel plot of publication bias for the included studies.
See this image and copyright information in PMC

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