Substance abusing adolescents (n=30) with Attention Deficit-Hyperactivity Disorder (ADHD) and substance abusing non-ADHD (n=30) adolescents were compared in terms of treatment outcomes. Although treatment outcomes did not vary significantly, a difference was observed in actual length of stay. Those with a behavior diagnosis stayed an average of 36 days in treatment, while those without such a diagnosis remained for 55 days. (JPS)