Respondents were sampled from among those aged 12–18 (M=15.75; median=16) admitted to treatment in 1993–1995 (n=3,331; 74% male, 52% White, 24% African American, 20% Hispanic). Eight percent used alcohol daily and 25% met criteria for alcohol dependence; 8.5% (N=288) abstained from drinking. Table 1 presents descriptive information for the full sample and for subgroups, including demographics, whether alcohol was a focus of treatment, prior treatment, alcohol and other substance use, diagnosis with lifetime alcohol dependence and depression based on criteria from the Diagnostic and Statistical Manual of Mental Disorders (Rev. 3rd ed.) [32], and prevalence of and mean age for reaching each milestone.