al., 2006). For the present study, patients were considered current users of alcohol (N = 534), cannabis (N = 340), cocaine (N = 483) or heroin (N = 364) if they used the substance during the prior 12 months. Patients’ median age was 37 years, 64.0% were male, 52.3% white, 25.3% Black, 21.1% Hispanic and 1.2% other, and 25.5% had not completed high school.
