title: Obsessive-compulsive disorder and personality disorder: evidence from the British National Survey of Psychiatric Morbidity 2000.
abstract: BACKGROUND
  Previous studies indicate that most individuals with obsessive-compulsive disorder (OCD) have comorbid personality disorders (PDs), particularly from the anxious cluster. However, the nature and strength of this association remains unclear, as the majority of previous studies have relied heavily on clinical populations. We analysed the prevalence of screen positive personality disorder in a representative sample of adults with OCD living in private households in the UK.
  
  
  METHODS
  A secondary analysis of data from the 2000 British National Survey of Psychiatric Morbidity. The prevalence of PD, as determined by the SCID-II questionnaire, was compared in participants with OCD, with other neuroses and non-neurotic controls. Within the OCD group we also analysed possible differences relating to sex and subtypes of the disorder.
  
  
  RESULTS
  The prevalence of any screen positive PD in the OCD group (N=108) was 74%, significantly greater than in both control groups. The most common screen positive categories were paranoid, obsessive-compulsive, avoidant, schizoid and schizotypal. Compared to participants with other neuroses, OCD cases were more likely to screen positively for paranoid, avoidant, schizotypal, dependent and narcissistic PDs. Men with OCD were more likely to screen positively for PDs in general, cluster A PDs, antisocial, obsessive-compulsive and narcissistic categories. The presence of comorbid neuroses in people with OCD had no significant effect on the prevalence of PD.
  
  
  CONCLUSIONS
  Personality pathology is highly prevalent among people with OCD who are living in the community and should be routinely assessed, as it may affect help-seeking behaviour and response to treatment.
authors.affiliation: Department of Neurology and Psychiatry, Botucatu Medical School, UNESP, Botucatu, Brazil, and Department of Forensic Psychiatry, St. Bartholomew's Hospital, London, UK. torresar@fmb.unesp.br
authors.forename: Albina R
authors.initials: AR
authors.lastname: Torres
authors.forename: Paul
authors.initials: P
authors.lastname: Moran
authors.forename: Paul
authors.initials: P
authors.lastname: Bebbington
authors.forename: Traolach
authors.initials: T
authors.lastname: Brugha
authors.forename: Dinesh
authors.initials: D
authors.lastname: Bhugra
authors.forename: Jeremy W
authors.initials: JW
authors.lastname: Coid
authors.forename: Michael
authors.initials: M
authors.lastname: Farrell
authors.forename: Rachel
authors.initials: R
authors.lastname: Jenkins
authors.forename: Glyn
authors.initials: G
authors.lastname: Lewis
authors.forename: Howard
authors.initials: H
authors.lastname: Meltzer
authors.forename: Martin
authors.initials: M
authors.lastname: Prince
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000175:diagnosis / Q000453:epidemiology*; D010554:Personality Disorders / Q000175:diagnosis / Q000453:epidemiology*; D015995:Prevalence; D011795:Surveys and Questionnaires; D006113:United Kingdom / Q000453:epidemiology