Adolescent substance use is often associated with psychiatric illness, particularly mood disorders, ADHD, conduct disorder and oppositional defiant disorders (Dawes et al., 2000). Although our adolescent AD group endorsed more symptoms relating to externalizing conditions than the control groups, none of the AD participants met the full criteria for any psychiatric disorder as defined by the K-SADS-PL. Our AD sample thus represented relatively pure AD, with minimal other drug use and no significant psychiatric symptomatology.
