Screening for trauma histories, posttraumatic stress disorder (PTSD), and subthreshold PTSD in psychiatric outpatients

The ability of the Structured Clinical Interview for DSM-IV (SCID) posttraumatic stress disorder (PTSD) module's screening question to identify individuals with PTSD or subthreshold PTSD was examined. First, the screen's sensitivity for detecting a trauma history was determined. Second, the incremental validity of a more thorough trauma assessment was examined by determining how many individuals responded negatively to the screen but then were diagnosed with PTSD or subthreshold PTSD. Last, the optimal SCID termination point for assessing subthreshold PTSD was determined. Using a trauma list increased the number of participants reporting a trauma; however, the SCID screen captured almost all individuals who had PTSD or subthreshold PTSD. When one screens for subthreshold PTSD, the SCID can be terminated on failure to meet Criterion B.