etc.), cocaine (coke, crack), PCP (angel dust, peace pills)/LSD (acid)/other psychedelics, and heroin (horse, smack)/opiates (methadone, opium, morphine, codeine, etc.). For tobacco, alcohol, and marijuana, response options were: “I have never tried [substance]”, “I have never tried [substance] but might sometime”, “I have tried [substance] but have not used it in the past 12 months”, “I have tried [substance] but have used it only once in a while in the past 12 months”, and “I have tried [substance] and have used it a lot in the past 12 months.” For all other substances, response options were: “Yes in the last 12 months”, “Yes but not in the last 12 months”, and “No.” Responses indicating ever use were converted to dichotomous yes/no values for analysis to maintain conformity across substances.
