title: The association between sleep problems and perceived health status: a Japanese nationwide general population survey.
abstract: OBJECTIVE
  Sleep problems in humans have been reported to impact seriously on daily function and to have a close association with well-being. To examine the effects of individual sleep problems on physical and mental health, we conducted a nationwide epidemiological survey and examined the associations between sleep problems and perceived health status.
  
  
  METHODS
  Cross-sectional surveys with a face-to-face interview were conducted in August and September, 2009, as part of the Nihon University Sleep and Mental Health Epidemiology Project (NUSMEP). Data from 2559 people aged 20 years or older were analyzed (response rate 54.0%). Participants completed a questionnaire on perceived physical and mental health statuses, and sleep problems including the presence or absence of insomnia symptoms (i.e., difficulty initiating sleep [DIS], difficulty maintaining sleep [DMS], and early morning awakening [EMA]), excessive daytime sleepiness (EDS), poor sleep quality (PSQ), short sleep duration (SSD), and long sleep duration (LSD).
  
  
  RESULTS
  The prevalence of DIS, DMS, and EMA was 14.9%, 26.6%, and 11.7%, respectively, and 32.7% of the sample reported at least one of them. At the complaint level, the prevalence of EDS, PSQ, SSD, and LSD was 1.4%, 21.7%, 4.0%, and 3.2%, respectively. Multiple logistic regression analyses revealed that DMS, PSQ, SSD, and LSD were independently associated with poor perceived physical health status; DIS, EDS, and PSQ were independently associated with poor perceived mental health status.
  
  
  CONCLUSIONS
  This study has demonstrated that sleep problems have individual significance with regard to perceived physical or mental health status.
authors.affiliation: Department of Psychiatry, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Ryuji
authors.initials: R
authors.lastname: Furihata
authors.forename: Makoto
authors.initials: M
authors.lastname: Uchiyama
authors.forename: Sakae
authors.initials: S
authors.lastname: Takahashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Suzuki
authors.forename: Chisato
authors.initials: C
authors.lastname: Konno
authors.forename: Kouichi
authors.initials: K
authors.lastname: Osaki
authors.forename: Michiko
authors.initials: M
authors.lastname: Konno
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Kaneita
authors.forename: Takashi
authors.initials: T
authors.lastname: Ohida
authors.forename: Toshiki
authors.initials: T
authors.lastname: Akahoshi
authors.forename: Shu
authors.initials: S
authors.lastname: Hashimoto
authors.forename: Tsuneto
authors.initials: T
authors.lastname: Akashiba
mesh_terms: D000367:Age Factors; D000368:Aged; D003430:Cross-Sectional Studies; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology / Q000523:psychology; D006304:Health Status; D006801:Humans; D007407:Interviews as Topic; D007564:Japan / Q000453:epidemiology; D016015:Logistic Models; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D015995:Prevalence; D012737:Sex Factors; D012892:Sleep Deprivation / Q000453:epidemiology / Q000523:psychology; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology / Q000523:psychology; D012893:Sleep Wake Disorders / Q000453:epidemiology / Q000523:psychology*; D055815:Young Adult