Table 2.
Substance use histories (n = 50)
| Substance | Mean age at initiation | Ever used, n (%) | Ever injected, n (%) | 30-Day use, n (%) |
|---|---|---|---|---|
| Marijuana | 12.5 | 50 (100) | 0 | 40 (80) |
| Alcohol | 12.8 | 50 (100) | 0 | 46 (92) |
| Cocaine | 15.4 | 49 (98) | 40 (80) | 23 (46) |
| Mushrooms | 15.7 | 47 (94) | 0 | 11 (22) |
| GHB | 15.9 | 18 (36) | 0 | 1 (2) |
| LSD | 16.3 | 45 (90) | 0 | 9 (18) |
| Methamphetamine | 16.6 | 41 (82) | 44 (48) | 11 (22) |
| Heroin | 16.6 | 50 (100) | 46 (92) | 43 (86) |
| Ecstasy | 17.0 | 48 (96) | 0 | 13 (26) |
| Ketamine | 17.1 | 36 (72) | 14 (28) | 7 (14) |
| PCP | 17.3 | 30 (60) | 0 | 1 (2) |
| Crack | 17.6 | 43 (86) | 21 (42) | 17 (34) |
| Stimulantsa | 14.1 | 41 (82) | 5 (10) | 8 (16) |
| Opioidsb | 14.6 | 50 (100) | 40 (80) | 44 (88) |
| Tranquilizersc | 15.6 | 46 (92) | 12 (24) | 23 (46) |
| Muscle relaxants | 15.9 | 28 (58) | 0 | 2 (4) |
| Over-the-counter | 16.0 | 34 (68) | 0 | 5 (10) |
| Sleeping pills | 17.9 | 21 (42) | 0 | 1 (2) |
| Sedatives | 18.6 | 2 (4) | 0 | 0 |
aIncludes Ritalin, Adderall, and Desoxyn
bIncludes Vicodin, codine, Oxycontin, morphine, and similar medications
cIncludes Xanax, Valium, Klonopin, and similar medications