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The co-occurrence of PTSD and dissociation: differentiating severe PTSD from dissociative-PTSD

Armour, Cherie, Karstoft, Karen-Inge and Richardson, J. Don (2014) The co-occurrence of PTSD and dissociation: differentiating severe PTSD from dissociative-PTSD. Social Psychiatry and Psychiatric Epidemiology, 49 (8). pp. 1297-1306. [Journal article]

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URL: http://dx.doi.org/10.1007/s00127-014-0819-y

DOI: doi:10.1007/s00127-014-0819-y

Abstract

PurposeA dissociative-posttraumatic stress disorder (PTSD) subtype has been included in the DSM-5. However, it is not yet clear whether certain socio-demographic characteristics or psychological/clinical constructs such as comorbid psychopathology differentiate between severe PTSD and dissociative-PTSD. The current study investigated the existence of a dissociative-PTSD subtype and explored whether a number of trauma and clinical covariates could differentiate between severe PTSD alone and dissociative-PTSD.MethodsThe current study utilized a sample of 432 treatment seeking Canadian military veterans. Participants were assessed with the Clinician Administered PTSD Scale (CAPS) and self-report measures of traumatic life events, depression, and anxiety. CAPS severity scores were created reflecting the sum of the frequency and intensity items from each of the 17 PTSD and 3 dissociation items. The CAPS severity scores were used as indicators in a latent profile analysis (LPA) to investigate the existence of a dissociative-PTSD subtype. Subsequently, several covariates were added to the model to explore differences between severe PTSD alone and dissociative-PTSD.ResultsThe LPA identified five classes: one of which constituted a severe PTSD group (30.5 %), and one of which constituted a dissociative-PTSD group (13.7 %). None of the included, demographic, trauma, or clinical covariates were significantly predictive of membership in the dissociative-PTSD group compared to the severe PTSD group.ConclusionsIn conclusion, a significant proportion of individuals report high levels of dissociation alongside their PTSD, which constitutes a dissociative-PTSD subtype. Further investigation is needed to identify which factors may increase or decrease the likelihood of membership in a dissociative-PTSD subtype group compared to a severe PTSD only group.

Item Type:Journal article
Keywords:Posttraumatic stress disorder, Dissociation, Dissociative subtype, CAPS, LPA, Veterans, Canadian
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Psychology
Research Institutes and Groups:Psychology Research Institute > Population Health Sciences and Mental Health Services
Psychology Research Institute
ID Code:33114
Deposited By: Prof Cherie Armour
Deposited On:08 Mar 2016 16:29
Last Modified:17 Oct 2017 16:20

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