Table 3:
Weighted substance use prevalence estimates across seventh and ninth grades by state and gender
| Grade 7 males |
Grade 7 females |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Washington |
Victoria |
Washington |
Victoria |
|||||||||
| % | 95% CI |
% | 95% CI |
% | 95% CI |
% | 95% CI |
|||||
| Low | High | Low | High | Low | High | Low | High | |||||
| Recent alcohol use (past month) | 11.5* | 8.0 | 16.4 | 35.3* | 30.0 | 40.9 | 13.2* | 10.3 | 16.8 | 26.6* | 22.3 | 31.3 |
| Regular alcohol use (3+ past month) | 3.4* | 1.6 | 7.4 | 10.6* | 7.6 | 14.6 | 2.9* | 1.8 | 4.6 | 6.6* | 4.6 | 9.4 |
| Frequent alcohol use (6+ past month) | 0.9* | 0.3 | 2.2 | 4.6* | 2.9 | 7.2 | 0.8 | 0.3 | 2.0 | 2.6 | 1.4 | 4.7 |
| Frequent binge drinking (3+ times) | 0.5 | 0.1 | 2.0 | 2.6 | 1.5 | 4.4 | 0.3 | 0.03 | 2.0 | 1.5 | 0.7 | 3.3 |
| Past month use of tobacco | 4.7 | 2.5 | 8.7 | 7.1 | 4.8 | 10.2 | 5.1 | 3.0 | 8.7 | 9.4 | 6.4 | 13.6 |
| Past month use of illicit drugs | 5.3 | 3.3 | 8.4 | 1.7 | 0.9 | 3.3 | 5.6 | 3.8 | 8.1 | 2.1 | 1.0 | 4.2 |
| Past month use of both alcohol and tobacco | 3.6 | 1.7 | 7.7 | 5.2 | 3.2 | 8.1 | 3.4 | 1.9 | 6.1 | 6.4 | 4.5 | 9.2 |
| Past month use of both alcohol and illicit drugs | 2.8 | 1.3 | 5.9 | 1.1 | 0.5 | 2.4 | 4.0 | 2.6 | 6.0 | 1.4 | 0.6 | 3.0 |
| Past month any alcohol or drug use | 14.3* | 10.4 | 19.4 | 37.2* | 31.7 | 43.1 | 15.6* | 12.3 | 19.6 | 30.5* | 25.8 | 35.8 |
| Grade 9 males | Grade 9 females | |||||||||||
| Recent alcohol use (past month) | 23.4* | 19.6 | 27.7 | 53.4* | 47.6 | 59.1 | 25.9* | 21.5 | 30.9 | 55.0* | 48.3 | 61.5 |
| Regular alcohol use (3+ past month) | 9.4* | 7.0 | 12.5 | 24.1* | 20.0 | 28.7 | 9.1* | 6.4 | 12.8 | 20.0* | 15.6 | 25.3 |
| Frequent alcohol use (6+ past month) | 3.4* | 2.2 | 5.1 | 11.8* | 9.0 | 15.3 | 3.5 | 2.2 | 5.4 | 8.0 | 5.2 | 12.1 |
| Frequent binge drinking (3+ times) | 2.4* | 1.5 | 3.9 | 6.5* | 4.6 | 9.2 | 2.2 | 1.1 | 4.3 | 6.6 | 4.2 | 10.1 |
| Past month use of tobacco | 8.3 | 4.7 | 14.1 | 17.2 | 13.6 | 21.5 | 10.9* | 7.7 | 15.1 | 26.1* | 20.6 | 32.5 |
| Past month use of illicit drugs | 13.1 | 10.0 | 17.0 | 9.7 | 6.4 | 14.4 | 14.4 | 10.9 | 18.7 | 7.5 | 5.1 | 10.8 |
| Past month use of both alcohol and tobacco | 4.3* | 2.6 | 6.8 | 15.2* | 12.0 | 19.1 | 8.7* | 6.0 | 12.3 | 22.0* | 16.9 | 28.1 |
| Past month use of both alcohol and illicit drugs | 7.3 | 5.4 | 9.8 | 9.4 | 6.2 | 14.1 | 11.7 | 8.8 | 15.4 | 7.1 | 4.7 | 10.5 |
| Past month any alcohol or drug use | 31.3* | 26.3 | 36.7 | 55.5* | 49.6 | 61.3 | 31.2* | 25.6 | 37.6 | 59.5* | 52.7 | 66.0 |
Point estimates and CI were derived using STATA ‘svyset’ procedures. Estimates are adjusted for sample design weights, school nesting and adjust for state age differences. Figures in bold indicate statistically significant state differences (p<0.05). Non-overlapping CI for state comparisons of same-sex prevalence estimates indicated with an asterisk.