Beyond treatment effects: comorbid psychopathologies and long-term outcomes among substance-abusing delinquents.

Secondary analyses of a randomized clinical trial controlled for treatment condition effects and examined the impact of comorbid psychopathologies on the mental health, physical health, and criminal behavior of 80 substance abusing delinquents approximately 5 years later in emerging adulthood. Overall, emerging adults with a comorbid disorder during adolescence scored higher on psychopathology, criminal behavior, and health problems. Participants with both internalizing and externalizing disorders exhibited more negative outcomes than those with a comorbid externalizing disorder. For the entire sample, more internalizing diagnoses forecasted higher internalizing and aggression scores, more criminality, and poorer physical health. More externalizing disorders predicted higher internalizing, delinquency, and criminality scores, but was unrelated to physical health. More internalizing diagnoses for females but not males predicted greater criminality, and especially more aggressive crimes in emerging adulthood.