E-cigarette ever use 2015 | 2.42 | 1.63 to 3.60 | <0.001 | 5.97 | 3.12 to 11.40 | <0.001 | 6.64 | 3.60 to 12.26 | <0.001 |
Susceptibility to smoking 2015 | 3.65 | 2.70 to 4.94 | <0.001 | 4.13 | 2.98 to 5.72 | <0.001 | 5.19 | 3.74 to 7.21 | <0.001 |
Any family member smokes 2015 | 1.89 | 1.40 to 2.56 | <0.001 | 1.93 | 1.43 to 2.61 | <0.001 | 1.83 | 1. 37 to 2.44 | <0.001 |
‘At least some’ friends smoke 2015 | 1.33 | 0.95 to 1.85 | 0.094 | 1.56 | 1.09 to 2.25 | 0.016 | 1.51 | 1.07 to 2.14 | 0.020 |
Interaction between e-cigarette and susceptibility | | | | 0.42 | 0.19 to 0.94 | 0.036 | 0.42 | 0.20 to 0.88 | 0.021 |
Interaction between e-cigarette and friends smoking | | | | 0.49 | 0.23 to 1.07 | 0.072 | 0.52 | 0.25 to 1.09 | 0.082 |