title: Evidence for a psychotic posttraumatic stress disorder subtype based on the National Comorbidity Survey.
abstract: OBJECTIVE
  This study assessed the distribution of posttraumatic stress disorder (PTSD) symptoms and psychosis indicators among a large sample of individuals with a lifetime diagnosis of PTSD. The identification of a psychotic PTSD subtype was also predicted.
  
  
  METHODS
  Using data from the National Comorbidity Survey a latent class analysis was conducted on the PTSD symptoms of intrusion, avoidance, and hyperarousal and the psychosis hallucination and delusion indicators.
  
  
  RESULTS
  Results indicated four latent classes, two of which had relatively high probabilities of endorsing the hallucination and delusion indicators. These classes were associated with a broad range of traumatic experiences. One particular class had high probabilities of endorsing both the psychosis indicators and the PTSD symptoms and was associated with a broad range of comorbid psychiatric disorders.
  
  
  CONCLUSIONS
  There was a candidate class that met the characteristics expected to be evident in a psychotic PTSD subtype.
authors.affiliation: School of Psychology, University of Ulster at Magee, Londonderry, BT48 7JL, Northern Ireland, UK. m.shevlin@ulster.ac.uk
authors.forename: Mark
authors.initials: M
authors.lastname: Shevlin
authors.forename: Cherie
authors.initials: C
authors.lastname: Armour
authors.forename: Jamie
authors.initials: J
authors.lastname: Murphy
authors.forename: James E
authors.initials: JE
authors.lastname: Houston
authors.forename: Gary
authors.initials: G
authors.lastname: Adamson
mesh_terms: D000328:Adult; D015897:Comorbidity; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D011618:Psychotic Disorders / Q000145:classification* / Q000453:epidemiology; D013313:Stress Disorders, Post-Traumatic / Q000145:classification / Q000453:epidemiology / Q000523:psychology*; D014481:United States / Q000453:epidemiology
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