title: Insomnia and Multimorbidity in the Community Elderly in China.
abstract: OBJECTIVE
  To examine the comorbidity between insomnia and medical conditions.
  
  
  METHODS
  This cross-sectional study was conducted in community adults, aged ≥ 60 years, who resided in one of four major cities in northern China. Sociodemographic and clinical data were collected simultaneously. A total of 3,176 elderly adults (1,292 male, mean ± standard deviation age 70.2 ± 6.8 years; 1,884 female, 68.8 ± 6.7 years) were interviewed.
  
  
  RESULTS
  The prevalence of specific medical conditions in both people with insomnia and people without insomnia was detected. Significantly higher proportions of arrhythmia, hypertension, cerebral hemorrhage, migraine, and hyperlipidemia were observed in people with insomnia than in people without insomnia. Moreover, a significantly higher proportion of insomnia was seen in elderly people with arrhythmia and migraine. We also found that elderly people with insomnia who took sleep medications reported a higher prevalence of coexisting arrhythmia, hypertension, and migraine, even after adjusting for age, sex, and depression.
  
  
  CONCLUSIONS
  Our results indicate associations between insomnia and medical conditions in the community elderly in China. People who complained of insomnia had poorer physical health conditions. Sleep medication may not be a covariate that influences the comorbidity of some specific physical conditions.
  
  
  BACKGROUND
  Trial name: The study of diagnosis and treatment of senile dementia in Hebei Province; URL: http://www.chictr.org.cn/showproj.aspx?proj=8194; Registration number: ChiCTR-RRC-11001345.
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.|Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Yu-Mei
authors.initials: YM
authors.lastname: Wang
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Song
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Ran
authors.initials: R
authors.lastname: Wang
authors.affiliation: Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Le
authors.initials: L
authors.lastname: Shi
authors.affiliation: Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Jia
authors.initials: J
authors.lastname: He
authors.affiliation: Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Teng-Teng
authors.initials: TT
authors.lastname: Fan
authors.affiliation: Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Wen-Hao
authors.initials: WH
authors.lastname: Chen
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Lan
authors.initials: L
authors.lastname: Wang
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Lu-Lu
authors.initials: LL
authors.lastname: Yu
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Gao
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Xiao-Chuang
authors.initials: XC
authors.lastname: Zhao
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Han
authors.affiliation: Department of Cardiology, Beijing Anzhen Hospital Affiliated to Capital Medical University, Beijing, China.
authors.forename: Mei-Yan
authors.initials: MY
authors.lastname: Liu
authors.affiliation: Peking University Sixth Hospital, Peking University Institute of Mental Health, Key Laboratory of Mental Health, Ministry of Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Lu
authors.affiliation: Institute of Mental Health, Hebei Medical University, Shijiazhuang, China.|Department of Psychiatry, First Hospital of Hebei Medical University, Shijiazhuang, China.
authors.forename: Xue-Yi
authors.initials: XY
authors.lastname: Wang
mesh_terms: D000368:Aged; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D015577:Geriatric Assessment / Q000379:methods / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D000076322:Multimorbidity; D015995:Prevalence; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology*; D014505:Urban Population / Q000706:statistics & numerical data
keywords: China; comorbid; elderly; insomnia; medical condition