“…Of particular concern are the high rates and co‐occurrence of multiple harmful dysregulated behaviours (Howe, Batchelor, & Coates, 2017; Rickwood, Telford, Parker, Tanti, & McGorry, 2014; Shingleton et al ., 2013). Dysregulated behaviours observed in this cohort include deliberate self‐harm (DSH), defined as the intentional, direct injuring of body tissue without suicidal intent (Klonsky, 2007); disordered eating, which includes a range of maladaptive or atypical eating behaviours (e.g., binge eating, purging) that may not meet diagnostic threshold for an eating disorder yet are still associated with distress or impairment (Buckholdt et al ., 2014; Sloan, O'Donnell, et al ., 2018); and substance misuse, encompassing harmful use of illicit drugs, prescribed medications or binge use of alcohol. While the presence of dysregulated behaviours poses significant harms in their own right, they are also associated with high levels of psychological distress, result in significant psychological morbidity, and can be a precursor to more severe mental health difficulties and/or suicide (Borges et al ., 2017; Fliege, Lee, Grimm, & Klapp, 2009; Franko & Keel, 2006).…”