a similar pattern of weekend binge-drinking found in the US (Moss et al., 1994). Although more AD participants than controls in our sample used tobacco (83% compared to 69%), comorbid substance use was substantially lower than in US adolescent AUD samples reported in previous studies. Tarter et al.(1995) demonstrated polysubstance abuse rates as high as 60% for cannabis and 26% for other drugs; in contrast, although 69% of our sample had experimented with cannabis, their lifetime consumption was 4 units, and none of our participants reported ever using any other type of illicit drug.
