Overall, our rates and ranking of alcohol, tobacco, and marijuana use and disorders were comparable to recent findings on national samples such as the MTF (Johnston et al., 2008) and the National Survey on Drug Use and Health (NSDUH; SAMHSA, 2008). Likewise, the level of alcohol use and SUD prevalence rates during young adulthood is consistent with past studies (Sher et al., 2005). Our data also confirm that experimentation, repeated-use, and SUD prevalence rates increase approximately linearly with age up to young adulthood. This was consistent with the earlier findings by Young et al. (2002) and other nationally representative samples (Bauman and Phongsavan, 1999; Johnston et al., 2008; SAMHSA, 2006, 2008). Despite the low prevalence of adolescent SUDs in our community-based sample, within 5 years these rates were at least doubled. Alcohol accounted for most of the abuse diagnoses in our population, while, not unlike findings from the National Comorbidity Survey, the highest rate of substance dependence was observed with tobacco at both waves of assessment (Anthony et al., 1994). Overall, despite the high prevalence of alcohol, tobacco, and marijuana
