Long-Term Effect of a Bystander Violence Intervention on Prevalence of Drug Use Disorders in a Prospective Cohort of Emerging Adults

Bystander interventions have shown promise to reduce interpersonal violence. Substance use may co-occur with violence; thus, bystander training to identify and intervene in these ‘risky’ situations may additionally reduce substance abuse. Prospective cohort study based on an existing (2010–2014) cluster-randomized controlled trial (RCT) evaluating Green Dot bystander intervention efficacy. Kentucky high school seniors (n = 3377) from intervention and control high schools were recruited in three waves to begin cohort surveys during the spring of 2014–2016 and followed from high school into adulthood through 2018. Green Dot bystander training in school as randomized (2010–2014) and reported after high school (2014–2018). Substance use disorder (SUD, DSM-5 criteria) rates (