Table 4.
Distal outcomes across four latent classes of alcohol and marijuana use in adjusted analyses: overall model statistics and pairwise comparisons
| Proportion | Standard error | Significant pairwise comparisons | |
|---|---|---|---|
| Past month frequency of sex without a condom, χ 2 = 16.815, p = 0.0008 | |||
| High dual use | 1.11 | 0.15 | |
| Moderate alcohol/increasing marijuana | 1.24 | 0.14 | Increasing marijuana vs. non-use, p < .001 |
| Moderate alcohol | 1.16 | 0.10 | Moderate alcohol vs. non-use, p = .007 |
| Non-use | 0.81 | 0.06 | |
| Multiple sexual partners, χ 2 = 18.388, p = 0.0004 | |||
| High dual use | 0.39 | 0.06 | Dual vs. non-use, p = .001 |
| Moderate alcohol/increasing marijuana | 0.46 | 0.06 | Increasing marijuana vs. non-use, p < .001 Increasing marijuana vs. moderate alcohol, p = .070 |
| Moderate alcohol | 0.29 | 0.04 | Moderate alcohol vs. non-use, p = .061 |
| Non-use | 0.20 | 0.03 | |
| Sexually transmitted infection, χ 2 = 20.267, p = 0.0001 | |||
| High dual use | 0.30 | 0.06 | Dual use vs. non-use, p < .001 |
| Moderate alcohol/increasing marijuana | 0.24 | 0.05 | Increasing marijuana vs. non-use, p = .002 |
| Moderate alcohol | 0.22 | 0.03 | Moderate alcohol vs. non-use, p = .002 |
| Non-use | 0.11 | 0.02 | |
| Teenage pregnancy, χ 2 = 35.153 p = 0.0001 | |||
| High dual use | 0.71 | 0.06 | Dual use vs. non-use, p < .001 Dual use vs. moderate alcohol, p = .011 |
| Moderate alcohol/increasing marijuana | 0.55 | 0.06 | Increasing marijuana vs. non-use, p < .001 |
| Moderate alcohol | 0.53 | 0.04 | Moderate alcohol vs. non-use, p = .002 |
| Non-use | 0.36 | 0.03 | |
Note: Models adjust for gender, intervention status, free/reduced price lunch, as well as academic performance, aggressive/disruptive behavior, attention/concentration problems, shy behavior, impulsivity, hyperactivity, and likeability/rejection as rated by first grade teachers