“…For instance, in a large sample of adolescents seeking treatment for substance use problems (n=4,421), 28% had co-occurring traumatic stress disorders (Turner, Muck, Muck, Stephens, & Sukumar, 2004). Clinical and developmental outcomes are often worse for adolescents with co-occurring PTSD and SUD (PTSD+SUD) than for teens with either disorder in isolation (Kilpatrick et al, 2003; Kingston & Raghavan, 2009; Suarez, Belcher, Briggs, & Titus, 2012). Adolescents with PTSD+SUD often present with complicated clinical profiles that may include symptoms of depression, high-risk sexual behavior, and self-harm behaviors (Danielson, Macdonald, et al, 2010; Esposito-Smythers & Spirito, 2004; Lichtenstein et al, 2010), further underscoring these youths’ complex needs that may require intervention beyond standard care for PTSD or SUD alone.…”