“…Of the 38 studies included in this review, 12 had identified co-occurring disorders in their studies, despite this not being the key focus of their research (Åström et al , 2013; Bradford et al , 2005; Coxe et al , 2021; Fedock et al , 2013; Moore et al , 2016; Padgett and Henwood, 2011; Powers et al , 2017; Price et al , 2017; Proeschold-Bell et al , 2016; Rosen et al , 2006; Siddiqui et al , 2009; Slayter, 2010). Of these 12 studies, 3 studies concentrated on interventions for homeless dually diagnosed participants (Bradford et al , 2005; Padgett and Henwood, 2011; Siddiqui et al , 2009) and 2 studies focused on participants experiencing a HIV diagnosis in addition to co-occurring mental health and substance use disorders (Powers et al , 2017; Proeschold-Bell et al , 2016).…”