Using the research domain criteria framework to track domains of change in comorbid PTSD and SUD.

ABSTRACT

OBJECTIVES: Comorbidity in diagnosis raises critical challenges for psychological assessment and treatment. The Research Domain Criteria (RDoC) Project, launched by the National Institutes of Mental Health, proposes domains of functioning as a way to conceptualize the overlap between comorbid conditions and inform treatment selection. However, further research is needed to understand common comorbidities (e.g., posttraumatic stress disorder [PTSD] and substance use disorder [SUD]) from an RDoC framework and how existing evidence-based treatments would be expected to promote change in the RDoC domains of functioning. To address these gaps, the current study examined change in 3 RDoC domains (Negative Valence Systems, Arousal/Regulatory Systems, and Cognitive Systems) during concurrent prolonged exposure (PE) and substance use treatment. METHOD: Participants were 85 individuals with co-occurring PTSD and SUD who received PE in a residential substance use treatment facility. They completed an experimental task to assess physiological reactivity to trauma and alcohol cues at pre- and posttreatment. RESULTS: Results showed decreased severity in all 3 RDoC domains of interest across the study period. Pairwise comparisons between domains revealed that Arousal/Regulatory Systems had the lowest severity at posttreatment. Subsequent hierarchical linear regression analyses showed that posttreatment domain scores were associated with posttreatment cue reactivity for trauma and alcohol cues. CONCLUSIONS: The findings provide preliminary evidence of how the RDoC domains of functioning may change with evidence-based treatments and are discussed in terms of the assessment and treatment of mental health problems using the RDoC framework. (PsycINFO Database Record