title: The changing prevalence and severity of obsessive-compulsive disorder criteria from DSM-III to DSM-IV.
abstract: OBJECTIVE
  Relative to other mental disorders, the prevalence of obsessive-compulsive disorder (OCD) in the general population is not well established. Some epidemiological surveys have determined the prevalence of DSM-III OCD, but this is one of the first reports, to the authors' knowledge, of DSM-IV OCD's prevalence.
  
  
  METHODS
  Data from the Australian National Survey of Mental Health and Well-Being, a nationally representative epidemiological survey of mental disorders, were analyzed. The prevalence and associated characteristics of DSM-IV OCD were identified, and then the data were rescored for DSM-III OCD. Cases defined by each system were compared.
  
  
  RESULTS
  The 12-month prevalence of DSM-IV OCD was 0.6%, considerably less than found in surveys employing DSM-III diagnostic criteria. DSM-IV OCD showed significantly higher levels of comorbidity, disability, health service use, and treatment received.
  
  
  CONCLUSIONS
  Changes in the reported prevalence and severity of OCD between DSM-III and DSM-IV cases are most likely a function of the differences in diagnostic criteria between DSM-III and DSM-IV.
authors.affiliation: Clinical Research Unit for Anxiety and Depression, St. Vincent's Hospital, 299 Forbes St., Darlinghurst, N.S.W., 2010, Australia.
authors.forename: Rocco
authors.initials: R
authors.lastname: Crino
authors.forename: Tim
authors.initials: T
authors.lastname: Slade
authors.forename: Gavin
authors.initials: G
authors.lastname: Andrews
mesh_terms: D000293:Adolescent; D000328:Adult; D001315:Australia / Q000453:epidemiology; D015897:Comorbidity; D039721:Diagnostic and Statistical Manual of Mental Disorders; D004185:Disability Evaluation; D005260:Female; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis / Q000453:epidemiology; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000175:diagnosis* / Q000453:epidemiology* / Q000523:psychology; D015995:Prevalence; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires