Table 2.
Cumulative Incidence of Substance Use and Violence by Grade 12 among Baseline Non-Initiators comparing CTC and Control Communities
| Non-Initiators at Baseline (Grade 5) |
Cumulative Incidence by Grade 12 |
|||||
|---|---|---|---|---|---|---|
| CTC | Control | CTC | Control | ARR | (95% CI) | |
| Smokeless tobacco | 98.1% | 97.2% | 31.6% | 34.6% | 0.97 | (0.82;1.15) |
| Inhalants | 91.5% | 91.3% | 29.3% | 31.9% | 0.93 | (0.81;1.07) |
| Prescription drugsa | 98.6% | 98.4% | 29.4% | 29.3% | 0.98 | (0.85;1.13) |
| Ecstasy (MDMA)a | 98.6% | 98.4% | 13.5% | 12.0% | 1.18 | (0.86;1.63) |
| Cocainea | 98.6% | 98.4% | 9.6% | 11.2% | 0.94 | (0.73;1.21) |
| LSDa | 98.6% | 98.4% | 11.7% | 10.6% | 1.15 | (0.90;1.46) |
| Stimulantsa | 98.6% | 98.4% | 6.4% | 6.8% | 0.96 | (0.68;1.36) |
| Other illegal drugs | 98.6% | 98.4% | 25.3% | 25.4% | 1.07 | (0.89;1.29) |
| Violence | 92.2% | 88.9% | 34.4% | 41.1% | 0.86 | (0.76;0.98) |
All figures represent averages across 40 imputed data sets. There were no significant baseline differences by intervention group. CTC = Communities That Care; CI = confidence interval.
ARR = adjusted risk ratio (for incidence in CTC versus control group) adjusted for student and community characteristics. Bolded ARRs are statistically significant at p < .05 (2-tailed).
At baseline (5th grade), respondents were asked if they had used any other illegal drugs beyond marijuana and inhalants. They were not asked specifically about the use of prescription drugs, ecstasy, cocaine, LSD, and stimulants. Analyses of these specific drugs in 12th grade were conducted among baseline non-initiators of other illegal drugs.