title: [Significance of sleep problems in the diagnosis of depressive and anxiety disorders].
abstract: OBJECTIVE
  To explore the significance of sleep problems in the diagnosis of depressive and anxiety disorders.
  
  
  METHODS
  A cross-sectional study was conducted through stratified convenient sampling in outpatients at our hospital from November 19, 2009 to January 19, 2010. A total of 203 outpatients (≥ 16 years old) were recruited from Department of Internal Medicine, Department of Surgery, Department of Obstetrics & Gynecology and other departments. Sleep Questionnaire was used as a screening tool for depressive and anxiety disorders. Composite international diagnostic interview (CIDI) was conducted by trained interviewers. According to diagnostic and statistical manual of mental disorders, Fourth Edition (DSM-IV) using the outcome from the logistic diagnostic procedure of CIDI as a golden standard for depressive and anxiety disorders, the validities of Sleep Questionnaire were calculated.
  
  
  RESULTS
  According to the Sleep Questionnaire, the 12-month prevalence of any sleep problem was 31.0% (63/203). The Cronbach's α coefficient of the questionnaire was 0.764 and the area under the ROC (receiver operating characteristic) curve 0.741. With a cut-off point of 1, the sensitivity was 68.0% and the specificity 74.2% respectively. And it achieved the best composite diagnostic capacity. The positive predictive values were at least 27.0%.
  
  
  CONCLUSIONS
  Sleep problem is a common complaint at a general hospital. When the duration and severity of sleep problem meet the standards of Sleep Questionnaire, a physician should be aware of possible depressive and anxiety disorders and more detailed information should be collected.
authors.affiliation: Department of Psychological Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Lian
authors.initials: L
authors.lastname: Li
authors.forename: Li-li
authors.initials: LL
authors.lastname: Shi
authors.forename: Xia
authors.initials: X
authors.lastname: Hong
authors.forename: Jin-ya
authors.initials: JY
authors.lastname: Cao
authors.forename: Jing
authors.initials: J
authors.lastname: Jiang
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Xiao-hui
authors.initials: XH
authors.lastname: Zhao
authors.forename: Yue-qin
authors.initials: YQ
authors.lastname: Huang
authors.forename: Jing
authors.initials: J
authors.lastname: Wei
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001008:Anxiety Disorders / Q000150:complications / Q000175:diagnosis*; D003430:Cross-Sectional Studies; D003866:Depressive Disorder / Q000150:complications / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012890:Sleep; D012893:Sleep Wake Disorders / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology; D011795:Surveys and Questionnaires; D055815:Young Adult