Presentation Title: Trajectories of Posttreatment Substance Use: A Secondary Analysis of the CTN Women and Trauma Study

Abstract: The current study applied a longitudinal, dynamic lens to 353 women dually diagnosed with substance use disorders (SUD) and post-traumatic stress disorder (PTSD) in an effort to classify common trajectories of substance use during the first 12 months following treatment. Over the past fifteen years interventions utilizing an integrated model of treatment for co-occurring SUD and PTSD in women have emerged to address the links between trauma and addiction. Identifying and understanding potential trajectories of recovery and barriers to the recovery process in co-occurring SUD and PTSD stand as crucial areas of investigation. As a secondary analysis of the largest behavioral trial to date for the concurrent treatment of PTSD and SUD in women (Hien et al., 2009), the present study utilized latent growth mixture models (LGMM) with multiple groups to estimate substance use patterns after treatment in order to further clarify the phenomenon of recovery for traumatized substance users. It is the first study to test the saliency of trajectory modeling for this commonly encountered clinical population. Results from the growth mixture analyses provided support for three distinct trajectories of use and recovery in the post-treatment year. Findings highlight the necessity of accounting for heterogeneity in post-treatment substance use, specific factors associated with positive and negative trajectories, and the relevance of incorporating methodologies like LGMM when evaluating SUD treatment outcomes.

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