Subjects who reported having used alcohol or marijuana, or both, in the 24 hours preceding the interview
| Group | No. of subjects | Substance; no. (and %) of users | ||
|---|---|---|---|---|
| Alcohol | Marijuana | |||
| No heroin | No cocaine (NHC) | 353 | 171 (48) | 99 (28) |
| Cocaine (C) | 568 | 280 (49) | 164 (29) | |
| Heroin | No cocaine (H) | 55 | 10 (18) | 17 (31) |
| Cocaine (HC) | 135 | 53 (40) | 55 (41) | |