Estimates from separate logistic regression models of IQOS awareness, interest in trying and susceptibility to trying among youth in Canada, England and the USA
| Variable | Aware of IQOS (n=11 704) | Interested in trying IQOS (n=11 396) | Susceptible to trying IQOS (n=11 424) |
| aOR† (95% CI) | |||
| Age | 0.90** (0.84 to 0.96) | 0.98 (0.94 to 1.03) | 0.95* (0.91 to 0.99) |
| Sex | |||
| Female | Ref | Ref | Ref |
| Male | 1.35*** (1.16 to 1.57) | 1.21*** (1.10 to 1.32) | 1.21*** (1.10 to 1.32) |
| Country | |||
| Canada | Ref | Ref | Ref |
| USA | 1.20* (1.01 to 1.44) | 1.00 (0.90 to 1.13) | 0.87* (0.78 to 0.97) |
| England | 0.71** (0.59 to 0.87) | 1.03 (0.92 to 1.16) | 1.17** (1.05 to 1.30) |
| Smoking status | |||
| Never smoker | Ref | Ref | Ref |
| Experimental smoker | 1.85*** (1.53 to 2.25) | 3.86*** (3.43 to 4.34) | 4.39*** (3.89 to 4.96) |
| Former smoker | 1.96** (1.23 to 3.14) | 4.02*** (2.81 to 5.75) | 2.47*** (1.72 to 3.56) |
| Current smoker | 1.24 (0.96 to 1.59) | 23.96*** (18.79 to 30.56) | 52.68*** (35.84 to 77.44) |
| Vaping status | |||
| Never vaper | Ref | Ref | Ref |
| Experimental vaper | 1.96*** (1.63 to 2.35) | 2.75*** (2.46 to 3.06) | 3.28*** (2.93 to 3.67) |
| Former vaper | 2.06* (1.10 to 3.85) | 2.18** (1.26 to 3.79) | 3.59*** (1.84 to 7.02) |
| Current vaper | 2.32*** (1.61 to 3.33) | 3.71*** (2.49 to 5.53) | 3.91*** (2.49 to 6.12) |
Analyses conducted using weighted data.
*P<0.05, **P<0.01, ***P<0.001
†ORs adjusted for age, sex, country, smoking status and vaping status.
aOR, adjusted ORs; Ref, reference category.