Abstract
Abstract Published findings are mixed regarding the underlying factor structure of the PTSD Checklist (PCL). Studies have found two-, three-, and four-factor solutions, which are only partially consistent with DSM-IV-defined PTSD symptom clusters (reexperiencing, avoidance, and hyperarousal). The current study examined the reliability, validity, and factor structure of the PCL in a sample of dually diagnosed (substance use disorder and other psychiatric disorder) participants living with HIV/AIDS. Results supported the robust psychometric properties of the PCL, with high reliability and validity. Using confirmatory factor analysis, two models, a second-order (two-factor) and a first-order (four-factor) solution were supported. The utility of the PCL and implications for the dimensionality of PTSD in this population are discussed
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