Table 1.
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) |