Adjusted prevalence ratios for ever having used e-cigarettes, overall and by tobacco smoking status, in Taiwan, 2015
| Entire population (n=25 112) | Ever smokers (n=5276) | Never smokers (n=19 843) | ||||
|---|---|---|---|---|---|---|
| Adjusted PR (95% CI) | Adjusted PR (95% CI) | Adjusted PR (95% CI) | ||||
| Smoking status | ||||||
| Never smokers | 1.0 | (Reference) | n/a | n/a | ||
| Former smokers | 8.3 | (5.21 to 13.1) | n/a | n/a | ||
| Current smokers | 21.5 | (15.4 to 29.8) | n/a | n/a | ||
| Age (years) | ||||||
| 15–17 | 4.4 | (2.53 to 7.68) | 7.0 | (3.71 to 13.4) | 8.5 | (2.96 to 24.1) |
| 18–24 | 5.2 | (3.73 to 7.26) | 6.1 | (4.24 to 8.67) | 10.7 | (4.11 to 28.1) |
| 25–44 | 2.1 | (1.57 to 2.81) | 2.4 | (1.75 to 3.23) | 2.7 | (1.21 to 5.80) |
| 45–64 | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| ≥65 | 0.4 | (0.22 to 0.66) | 0.3 | (0.18 to 0.56) | 0.5 | (0.09 to 3.03) |
| Sex | ||||||
| Female | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| Male | 1.3 | (0.96 to 1.87) | 1.0 | (0.70 to 1.36) | 2.4 | (1.48 to 3.80) |
| Residing in municipal area | ||||||
| No | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| Yes | 1.2 | (0.94 to 1.41) | 1.1 | (0.90 to 1.45) | 1.4 | (0.91 to 2.19) |
| Married | ||||||
| No | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| Yes | 0.7 | (0.54 to 0.89) | 0.7 | (0.50 to 0.84) | 0.6 | (0.32 to 1.13) |
| Education level | ||||||
| Middle school or below | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| High school | 1.5 | (0.97 to 2.30) | 1.5 | (0.97 to 2.42) | 0.7 | (0.19 to 2.28) |
| College or above | 1.6 | (1.04 to 2.51) | 1.4 | (0.90 to 2.31) | 1.1 | (0.32 to 4.05) |
| Employed | ||||||
| No | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| Yes | 0.9 | (0.70 to 1.17) | 1.0 | (0.72 to 1.29) | 1.3 | (0.73 to 2.25) |
| Monthly household income (NTD) | ||||||
| ≤60 000 | 1.0 | (Reference) | 1.0 | (Reference) | 1.0 | (Reference) |
| ≥60 001 | 1.6 | (1.22 to 1.97) | 1.5 | (1.12 to 1.94) | 1.8 | (1.09 to 3.09) |
| Unknown | 1.1 | (0.81 to 1.50) | 1.2 | (0.86 to 1.73) | 0.9 | (0.45 to 1.70) |
PR, prevalence ratio.