title: Latent profile analysis and principal axis factoring of the DSM-5 dissociative subtype.
abstract: OBJECTIVE
  A dissociative subtype has been recognized based on the presence of experiences of depersonalization and derealization in relation to DSM-IV posttraumatic stress disorder (PTSD). However, the dissociative subtype has not been assessed in a community sample in relation to the revised DSM-5 PTSD criteria. Moreover, the 20-item PTSD Checklist for DSM-5 (PCL-5) currently does not assess depersonalization and derealization.
  
  
  METHODS
  We therefore evaluated two items for assessing depersonalization and derealization in 557 participants recruited online who endorsed PTSD symptoms of at least moderate severity on the PCL-5.
  
  
  RESULTS
  A five-class solution identified two PTSD classes who endorsed dissociative experiences associated with either 1) severe or 2) moderate PTSD symptom severity (D-PTSD classes). Those in the severe dissociative class were particularly likely to endorse histories of childhood physical and sexual abuse. A principal axis factor analysis of the symptom list identified six latent variables: 1) Reexperiencing, 2) Emotional Numbing/Anhedonia, 3) Dissociation, 4) Negative Alterations in Cognition & Mood, 5) Avoidance, and 6) Hyperarousal.
  
  
  CONCLUSIONS
  The present results further support the presence of a dissociative subtype within the DSM-5 criteria for PTSD.
authors: Department of Psychiatry, Western University, London, Ontario, Canada.|Department of Psychology, Western University, London, Ontario, Canada.|Graduate Program in Neuroscience, Western University, London, Ontario, Canada; pfrewen@uwo.ca.
authors: Paul A
authors: PA
authors: Frewen
authors: Department of Psychology, Western University, London, Ontario, Canada.
authors: Matthew F D
authors: MF
authors: Brown
authors: Research Department, Clinic of Psychiatry, Ev. Krankenhaus Bielefeld, Bielefeld, Germany.
authors: Carolin
authors: C
authors: Steuwe
authors: Department of Psychiatry, Western University, London, Ontario, Canada.|Graduate Program in Neuroscience, Western University, London, Ontario, Canada.
authors: Ruth A
authors: RA
authors: Lanius
keywords: Posttraumatic stress disorder; dissociation; dissociative subtype; psychological trauma; trauma-related altered states of consciousness