Table 2 Included substance use outcome measures
Substance-use outcome | Included measures |
|---|---|
Alcohol use | Alcohol use (yes/no) in the past week, month or year; number of occasions of alcohol use in the past month; mean alcohol units per day/week or in the last month; ever used alcohol |
Tobacco use | Tobacco use (yes/no) in the past week, month or year; number of occasions of tobacco use in the past month; mean cigarettes per day/week or in the last month; ever used tobacco |
Cannabis use | Cannabis use (yes/no) in the past week, month or year; number of occasions of cannabis use in the past month; mean joints per day/week or in the last month; ever used cannabis |
Heavy alcohol use | Binge drinking or drunkenness (yes/no) in the past month; 3 or more episodes of drunkenness (yes/no) in the past month; heavy drinking in the past month (as defined by study authors) |
Other illicit drug use | Hard drug/cocaine/inhalant-use in the past month; number of occasions of prescription drug/poly-drug/hard drug/other drug/inhalant-use in the past month; ever used meth/amphetamine/ecstasy/cocaine/illicit drugs (some included cannabis) or sniffed glue |