title: The prevalence of insomnia in the general population in China: A meta-analysis.
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.
  
  
  BACKGROUND
  CRD 42016043620.
authors.affiliation: Shenzhen Key Laboratory for Psychological Healthcare & Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital & Shenzhen Mental Health Center, Shenzhen, China.|Faculty of Mental health, Shenzhen University, Guangdong province, China.
authors.forename: Xiao-Lan
authors.initials: XL
authors.lastname: Cao
authors.affiliation: Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China.
authors.forename: Shi-Bin
authors.initials: SB
authors.lastname: Wang
authors.affiliation: The Affiliated Mental Health Center, Tongji Medical College of Huazhong University of Science & Technology, Wuhan, China.
authors.forename: Bao-Liang
authors.initials: BL
authors.lastname: Zhong
authors.affiliation: The National Clinical Research Center for Mental Disorders, China & Center of Depression, Beijing Institute for Brain Disorders & Mood Disorders Center, Beijing Anding Hospital, Capital Medical University, Beijing, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.affiliation: The University of Notre Dame Australia/Marian Centre, Perth, Australia.|School of Psychiatry & Clinical Neurosciences, University of Western Australia, Perth, Australia.
authors.forename: Gabor S
authors.initials: GS
authors.lastname: Ungvari
authors.affiliation: Department of Psychiatry, University of Melbourne, Melbourne, Victoria, Australia.
authors.forename: Chee H
authors.initials: CH
authors.lastname: Ng
authors.affiliation: Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Psychiatry, Chinese University of Hong Kong, Hong Kong SAR, China.
authors.forename: Helen F K
authors.initials: HF
authors.lastname: Chiu
authors.affiliation: Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China.|Kiang Wu Nursing College of Macau, Macao SRA, China.
authors.forename: Grace K I
authors.initials: GK
authors.lastname: Lok
authors.affiliation: Shenzhen Key Laboratory for Psychological Healthcare & Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital & Shenzhen Mental Health Center, Shenzhen, China.
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Lu
authors.affiliation: Guangdong Mental Health Center, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangdong Province, China.
authors.forename: Fu-Jun
authors.initials: FJ
authors.lastname: Jia
authors.affiliation: Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China.
authors.forename: Yu-Tao
authors.initials: YT
authors.lastname: Xiang
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012727:Sex Characteristics; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology* / Q000473:pathology