Table 2 Characteristics of the DRIVE Study participants.
| Characteristic | n (%) |
|---|---|
| AUDIT‐C score | |
| At risk | 7851 (39.3) |
| Not at risk | 12 149 (60.8) |
| Kessler‐10 score | |
| Low | 5822 (29.1) |
| Moderate | 7664 (38.3) |
| High | 4992 (24.9) |
| Very high | 1535 (7.7) |
| Self‐harm* | |
| No | 18 000 (92.1) |
| Yes | 1544 (7.9) |
| Driven after drinking alcohol in the past 4 weeks | |
| Never | 18 574 (93.4) |
| 1–2 times | 1173 (5.9) |
| ⩾3 times | 89 (0.5) |
| Don't know | 47 (0.2) |
| Driven after smoking marijuana in the past 4 weeks | |
| Never | 19 250 (96.8) |
| 1–2 times | 398 (2.0) |
| ⩾3 times | 176 (0.9) |
| Don't know | 56 (0.3) |
| How often would you smoke marijuana? | |
| Never | 17 292 (86.1) |
| ⩽1 times a month | 2098 (10.4) |
| 2–4 times a month | 400 (2.0) |
| 2–3 times a week | 121 (0.6) |
| ⩾4 times a week | 176 (0.9) |
| How often do you take other drugs? | |
| Never | 18 681 (93.2) |
| ⩽1 time a month | 1033 (5.2) |
| 2–4 times a month | 238 (1.2) |
| 2–3 times a week | 52 (0.3) |
| 4 times a week or more | 43 (0.2) |
AUDIT‐C, Alcohol Use Disorders Identification Test Consumption sub‐Scale.
*Question related to self harm: “In the past 12 months have you ever deliberately hurt yourself or done anything that you knew might have harmed you or even killed you?”