“…Youths who experience CM are more likely to initiate substance use (SU) earlier, escalate SU more rapidly, meet criteria for a substance use disorder (SUD), and experience relapse following SU treatment compared to their non-maltreated peers (Alvarez-Alonso et al, 2016;Dube, et al, 2006;Mills et al, 2014;Shin et al, 2013;Van Dam et al, 2014). A burgeoning literature has also demonstrated that youth who experience CM are at greater risk of engaging in polysubstance use (polySU; Alvarez-Alonso et al, 2016;Rivera, Bray, Guastaferro, Kugler, & Noll, 2018;Snyder & Smith, 2015), a SU pattern that is itself associated with amplified risk of experiencing an SUD (Moss, Chen, & Yi, 2014). Moreover, polySU also represents a significant risk factor for a number of mental and physical health issues (Hakansson, Schlyter, Berglund, 2011;Jones et al, 2017;Smith et al, 2011;Timko, Han, Woodhead, Shelley, & Cucciare, 2018), making it a pertinent SU pattern to investigate in a population already at elevated risk for poor health outcomes.…”