a. Attitudes towards ECs | ||||
 | Uncertain that EC use harms health | Tolerant attitudes towards EC use | ||
 | Crude OR | Adjusted OR | Crude OR | Adjusted OR |
 | (95% CI)a | (95% CI)b | (95% CI)a | (95% CI)b |
Exposure to EC advertising | ||||
 No | 1 | 1 | 1 | 1 |
 Yes | 1.18 (1.05, 1.32)** | 1.17 (1.05, 1.31)** | 1.21 (1.07, 1.37)** | 1.21 (1.07, 1.36)** |
 1 type | 1.14 (1.00, 1.29)* | 1.13 (1.00, 1.29)* | 1.20 (1.05, 1.38)** | 1.19 (1.04, 1.37)* |
  ≥ 2 types | 1.30 (1.08, 1.57)** | 1.29 (1.06, 1.55)** | 1.25 (1.02, 1.53)* | 1.25 (1.02, 1.53)* |
 P for trend c | < 0.01 | < 0.01 | < 0.01 | < 0.01 |
b. Attitudes towards the tobacco industry | ||||
 | The tobacco industry is respectable | Tobacco companies make youth smoke | ||
 | Crude OR | Adjusted OR | Crude OR | Adjusted OR |
 | (95% CI)a | (95% CI)b | (95% CI)a | (95% CI)b |
Exposure to EC advertising | ||||
 No | 1 | 1 | 1 | 1 |
 Yes | 1.42 (1.27, 1.60)*** | 1.42 (1.26, 1.59)*** | 1.09 (0.98, 1.22) | 1.09 (0.98, 1.22) |
 1 type | 1.36 (1.20, 1.55)*** | 1.36 (1.19, 1.55)*** | 1.08 (0.96, 1.22) | 1.08 (0.96, 1.22) |
  ≥ 2 types | 1.59 (1.31, 1.92)*** | 1.58 (1.30, 1.91)*** | 1.12 (0.93, 1.34) | 1.11 (0.92, 1.33) |
 P for trend c | < 0.001 | < 0.001 | 0.11 | 0.12 |