Table 1.
Participant characteristics (N=93)
| Demographics | |
| Mean (SD) age in years | 16.4 (1.2) |
| % Male | 100 |
| % Black | 21.5 |
| % White | 45.1 |
| % Hispanic/Latino | 26.9 |
| % Other race/ethnicity | 6.5 |
| Substance use | |
| Marijuana (% past 3 months) | |
| Never used | 10.5 |
| Less than once a month | 12.6 |
| 1–2 times a month | 6.3 |
| 3–4 times a month | 11.6 |
| 3–4 times a week | 9.5 |
| Once a day | 7.5 |
| A few times a day | 43.0 |
| Tobacco (% per day) | |
| Non-smokers | 37.9 |
| 0–15 | 32.6 |
| 16–25 | 21.5 |
| 26+ | 8.6 |
| Alcohol (% past 3 months) | |
| Never used | 15.8 |
| Less than once a month | 32.6 |
| 1–2 times a month | 22.1 |
| 3–4 times a month | 18.9 |
| 3–4 times a week | 5.3 |
| Once a day | 3.2 |
| A few times a day | 2.1 |
| Withdrawal discomfort score | 24.9 (9.4) |
| Mean (SD) number of days between | |
| Entry & Assessment | 5.7 (12.7) |