Table 2.
Logistic regression on e-cigarette ever use- adjusted for clustering within school
| Unadjusted model | Adjusted model 1 | Adjusted model 2 recoded e-cig variable | Adjusted model 3 fully imputed m = 20 | |
|---|---|---|---|---|
| OR (99 % CI) | OR (99 % CI) | OR (99 % CI) | OR (99 % CI) | |
| n = 2874 | n = 3425 | n = 3808 | ||
| Recall e-cig supermarket | 2.56 (1.89 to 3.47) | 1.66 (0.95 to 2.89) | 1.76 (0.94 to 3.29) | 1.82 (0.99 to 3.38) |
| Recall e-cig small shop | 2.89 (2.36 to 3.54) | 1.93 (1.51 to 2.48) | 1.96 (1.64 to 2.34) | 1.92 (1.61 to 2.29) |
| Recall internet e-cig ads | 2.02 (1.73 to 2.35) | 1.72 (1.17 to 2.52) | 1.90 (1.26 to 2.84) | 1.76 (1.29 to 2.40) |
| Recall other e-cig ads | 1.57 (1.33 to 1.85) | 1.00 (0.83 to 1.20) | 1.10 (0.93 to 1.31) | 1.12 (0.91 to 1.36) |
| Never smoked tobacco | 0.08 (0.05 to 0.12) | 0.08 (0.05 to 0.12) | 0.08 (0.05 to 0.12) | |
| Gender- male | 1.24 (0.96 to 1.60) | 1.11 (0.76 to 1.61) | 1.10 (0.71 to 1.71) | |
| Ethnic group-non-white | 1.81 (0.75 to 4.36) | 1.48 (0.63 to 3.47) | 1.44 (0.63 to 3.29) | |
| Age | 1.15 (1.08 to 1.22) | 1.17 (1.10 to 1.24) | 1.16 (1.09 to 1.24) | |
| FAS low | 1 | 1 | 1 | |
| FAS medium | 1.01 (0.76 to 1.35) | 1.00 (0.78 to 1.27) | 1.04 (0.81 to 1.33) | |
| FAS high | 1.14 (0.63 to 2.04) | 1.16 (0.65 to 2.06) | 1.16 (0.66 to 2.03) |
Bold p < 0.01
Hosmer-Lemeshow chi square goodness of fit Adjusted model 1 = 6.6, p = 0.58 Adjusted model 2 = 4.42, p = 0.82