(unconditional) rates reported by prior surveys of youth and therefore provide additional information concerning risk of substance abuse after initial use during adolescence. The risk of drug abuse among adolescent users is of concern considering the recent findings from the Monitoring the Future and NSDUH, which show a resurgence of marijuana use among adolescents, even surpassing use of nicotine, a finding that may reflect increasingly tolerant attitudes concerning the use of illicit drugs.10,12
