A longitudinal study of the relationships among alcohol use, marijuana/hashish use, cocaine use, and emotional/psychological functioning problems in a cohort of high-risk youths.

There is increasing recognition that children involved in the justice system often have serious, multiple problems in the areas of physical abuse, sexual exploitation, and alcohol/other drug use (ADM). Using data collected in a longitudinal study of detained juveniles, we test a model of the relationships of these problems. Significant over-time interrelationships are found among these problems. Research and policy implications of these important findings are drawn.