Treatment retention and engagement of emerging adults with opioid use disorders can be particularly challenging. This study compares treatment outcomes of young adults with primary opioid use (OU) to those with primary marijuana or alcohol use (MAU), who received the Adolescent Community Reinforcement Approach (A-CRA), an evidence-based therapy for the treatment of substance use. The MAU and OU groups were comprised of an outcome sample of 419 young adults ages 18-25. Groups were compared on intake demographics, clinical characteristics, and measures of treatment retention and other associated factors, including treatment initiation and engagement. Outcome measures were administered at A-CRA intake and at 3, 6, and 12 months post-intake. Both groups were similar in treatment retention, initiation, and engagement. Both groups showed a similar decrease in alcohol (p < .001) and marijuana use (p < .001). The OU group had significantly less opioid use at 3 months (p < .001) and maintained this decrease, but did not improve to the level observed in the MAU group at the 12-month follow-up. The Adolescent Community Reinforcement Approach merits further study as a behavioral treatment for young adults with opioid use.
Keywords: Adolescent community reinforcement approach; emerging adults; opioid; substance use; treatment retention; young adults.