Table 4.
Dual trajectories of alcohol with other substance use
| Variable | Alcohol |
Heavy drinking |
||
| Minimal | Increasing | None | Increasing | |
| Probability of substance use group conditional on alcohol/heavy drinking group | ||||
| Cigarettes | ||||
| None | 91% | 53% | 90% | 41% |
| Users | 9% | 47% | 10% | 59% |
| Marijuana | ||||
| None | 91% | 54% | 90% | 44% |
| Users | 9% | 46% | 10% | 56% |
| Chewing tobacco | ||||
| None | 93% | 67% | 91% | 65% |
| Users | 7% | 33% | 9% | 35% |
| Prescription drug misuse | ||||
| None | 96% | 76% | 96% | 69% |
| Users | 4% | 24% | 4% | 31% |
| Other drug use | ||||
| None | 100% | 88% | 99% | 85% |
| Users | 0% | 12% | 1% | 15% |
| Probability of alcohol/heavy drinking group conditional on substance use group | ||||
| Cigarettes | ||||
| None | 85% | 15% | 92% | 8% |
| Users | 40% | 60% | 48% | 52% |
| Marijuana | ||||
| None | 85% | 15% | 92% | 8% |
| Users | 41% | 59% | 50% | 50% |
| Chewing tobacco | ||||
| None | 82% | 18% | 88% | 12% |
| Users | 43% | 57% | 58% | 42% |
| Prescription drug misuse | ||||
| None | 81% | 19% | 88% | 12% |
| Users | 35% | 65% | 41% | 59% |
| Other drug use | ||||
| None | 79% | 21% | 86% | 14% |
| Users | 10% | 90% | 20% | 80% |