Table 3.
Multivariable estimates from the final multinomial logistic regression * with only main effects.
| Main Effect of | Referent Group | Cluster 2 Mainly Tobacco and Alcohol | Cluster 3 High Alcohol and Cannabis | Cluster 4 Poly-Users | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | OR | 95% CI | |||||
| Gender (boys) | Girls | 0.67 | 0.46 | 0.98 | 2.13 | 1.32 | 3.43 | 1.31 | 0.81 | 2.13 |
| Grade (10th) | 9th | 1.84 | 1.15 | 2.96 | 1.45 | 0.75 | 2.80 | 1.03 | 0.49 | 2.16 |
| Poor perceived academic achievements | at least good | 2.86 | 1.93 | 4.23 | 1.62 | 1.01 | 2.60 | 1.90 | 1.16 | 3.12 |
| Rural resident | urban | 0.75 | 0.50 | 1.12 | 1.10 | 0.68 | 1.80 | 0.60 | 0.34 | 1.05 |
| Low family affluence | average or high | 0.90 | 0.56 | 1.45 | 0.84 | 0.45 | 1.58 | 1.19 | 0.66 | 2.14 |
| Low local area status | average or high | 1.20 | 0.75 | 1.91 | 1.48 | 0.84 | 2.61 | 1.64 | 0.92 | 2.90 |
* Reference category Cluster 1—non-users; results significant at p < 0.05 are bolded; OR—adjusted odds ratio; CI—confidence interval.