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      Exploring the gold-standard: Evidence for a two-factor model of the Clinician Administered PTSD Scale for the DSM–5.

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          Abstract

          <div class="section"> <a class="named-anchor" id="S1"> <!-- named anchor --> </a> <h5 class="section-title" id="d4452237e144">Objective</h5> <p id="P1">The latent factor structure of posttraumatic stress disorder (PTSD) remains a source of considerable variability. The current study compared several a priori factor structures, as well as a novel 2-factor structure of posttraumatic psychological distress as measured by the Clinician Administered PTSD scale for the <i>DSM-5</i> (CAPS-5). Additionally, variability in diagnostic rates according to the divergent <i>DSM-5</i> and <i>ICD-11</i> criteria were explored. </p> </div><div class="section"> <a class="named-anchor" id="S2"> <!-- named anchor --> </a> <h5 class="section-title" id="d4452237e158">Method</h5> <p id="P2">The setting for this study was a level 1 trauma center in a U.S. metropolitan city. Data were pooled from two studies ( <i>N</i> = 309) and participants were administered the CAPS-5 at one ( <i>n</i> = 139) or six months post-injury ( <i>n</i> =170). Confirmatory factor analysis (CFA) was used to compare several factor models, and prevalence rates based on <i>DSM-5</i> and <i>ICD-11</i> criteria were compared via <i>z</i>-tests and kappa. </p> </div><div class="section"> <a class="named-anchor" id="S3"> <!-- named anchor --> </a> <h5 class="section-title" id="d4452237e182">Results</h5> <p id="P3">Confirmatory factor analyses of five factor structures indicated good fit for all models. A novel 2-factor model based on competing models of PTSD symptoms and modification indices was then tested. The 2-factor model of the CAPS-5 performed as well or better on most indices compared to a 7-factor hybrid. Comparisons of PTSD prevalence rates found no significant differences, but agreement was variable. </p> </div><div class="section"> <a class="named-anchor" id="S4"> <!-- named anchor --> </a> <h5 class="section-title" id="d4452237e187">Conclusions</h5> <p id="P4">These findings indicate that the CAPS-5 can be seen as measuring two distinct phenomena: posttraumatic stress disorder and general posttraumatic dysphoria. This is an important contribution to the current debate on which latent factors constitute PTSD and may reduce discordance. </p> </div>

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          Author and article information

          Journal
          Psychological Trauma: Theory, Research, Practice, and Policy
          Psychological Trauma: Theory, Research, Practice, and Policy
          American Psychological Association (APA)
          1942-969X
          1942-9681
          September 2018
          September 2018
          : 10
          : 5
          : 551-558
          Article
          10.1037/tra0000310
          5809239
          28795824
          © 2018
          Product

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