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Effectiveness of trajectory class as predictor of substance use in adolescence.
| Predictor χ2 (p) |
||||
|---|---|---|---|---|
| Inattentive/hyperactive class | Aggressive class | Comorbid class | ||
| First drink | 3.8 (.05) | 3.3 (.07) | 22.6 (<.001) | |
| First time drunk | 6.4 (.01) | 5.2 (.02) | 21.3 (<.001) | |
| Marijuana use | 5.1 (.02) | 2.5 (.11) | 22.9 (<.001) | |
