ORs and 95% CIs from logistic regression analyses of e-cigarette use and future smoking intention among 10–11-year-old never-smokers
| E-cigarette use | Future smoking intention | |||||
|---|---|---|---|---|---|---|
| Univariate models | Multivariate model (n=1280) | Univariate models | Multivariate model without e-cigarettes (n=1299) | Final model (n=1280) | ||
| Parents smoke/use e-cigarettes (reference=neither) | E-cigarettes only | 3.56 (1.15 to 11.06) | 3.32 (1.08 to 10.17) | 1.95 (0.79 to 4.83) | 1.32 (0.46 to 3.83) | 1.15 (0.39 to 3.63) |
| Tobacco only | 1.85 (0.93 to 3.69) | 1.62 (0.79 to 3.30) | 2.61 (1.69 to 4.05) | 2.12 (1.35 to 3.32) | 2.09 (1.30 to 3.44) | |
| Both | 4.51 (2.29 to 8.89) | 3.40 (1.73 to 6.69) | 2.49 (1.46 to 4.24) | 2.09 (1.20 to 3.65) | 1.88 (1.07 to 3.31) | |
| Friends smoking (reference =no) | Yes | 4.53 (2.37 to 8.65) | 5.25 (2.62 to 10.55) | 5.22 (3.18 to 8.57) | 4.05 (2.27 to 7.22) | 3.40 (1.86 to 6.22) |
| Sex (reference =boys) | Girls | 0.61 (0.38 to 0.98) | 0.76 (0.46 to 1.26) | 0.58 (0.41 to 0.84) | 0.63 (0.43 to 0.94) | 0.66 (0.44 to 0.97) |
| FAS | 0.82 (0.68 to 0.99) | 0.90 (0.75 to 1.09) | 0.83 (0.73 to 0.94) | 0.87 (0.75 to 1.00) | 0.87 (0.75 to 1.00) | |
| E-cigarette use (reference =no) | Yes | – | – | 4.28 (2.52 to 72.8) | 3.21 (1.66 to 6.23) | |
Significant associations (p<0.05) are highlighted in bold.
FAS, Family Affluence Scale.