Table 5.
Country comparisons among daily smokers and non-daily smokers (past-daily smokers) and reduced smoking and discontinued smoking at Wave 2 (2018) between those who were vaping and not vaping at Wave 1 (2016).
| W1 Smoking Status | W1 Vaping | W2 Smoking Status | Canada (n = 1411) | United States (n = 900) | England (n = 1399) | Australia (n = 726) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | % | 95% CI | n | % | 95% CI | n | % | 95% CI | n | % | 95% CI | |||
| Daily n = 3983 |
Yes | Remained daily | 288 | 81.0 | 75.2–85.7 | 134 | 66.1 | 56.3–74.7 | 255 | 82.8 | 76.3–87.8 | 66 | 83.0 | 67.9–91.9 |
| No | 731 | 82.7 | 79.5–85.4 | 519 | 76.7 | 70.4–82.0 | 834 | 88.4 | 85.3–90.9 | 529 | 85.5 | 81.1–89.0 | ||
| Yes | Reduced to non-daily | 43 | 12.6 * | 8.7–17.9 | 23 | 16.2± | 9.9–25.5 | 21 | 7.5 † | 4.4–12.6 | 6 | 6.5 | 1.3–27.5 | |
| No | 37 | 4.9 | 3.4–7.0 | 28 | 8.4 | 5.2–13.5 | 33 | 2.9 | 1.7–4.8 | 18 | 3.2 | 1.7–5.9 | ||
| Yes | Discontinued smoking | 24 | 6.4 * | 3.9–10.3 | 24 | 17.7 | 11.3–26.5 | 26 | 9.7 | 6.0–15.4 | 10 | 10.5 | 4.8–21.6 | |
| No | 104 | 12.4 | 10.1–15.2 | 68 | 14.9 | 10.5–20.7 | 99 | 8.8 | 6.6–11.5 | 63 | 11.3 | 8.2–15.5 | ||
| Non-daily n = 453 |
Yes | Remained smoking | 61 | 76.8 | 64.7–85.7 | 39 | 75.5 | 52.8–89.4 | 47 | 86.6 | 72.0–94.2 | 7 | 98.7 | 88.6–99.9 |
| No | 73 | 77.1 | 65.7–78.9 | 37 | 54.5 | 34.6–73.0 | 57 | 80.1 | 66.6–89.0 | 17 | 60.2 | 38.7–78.4 | ||
| Yes | Discontinued smoking | 23 | 23.2 | 14.3–35.3 | 9 | 24.5 | 10.6–47.2 | 10 | 13.4 | 5.8–28.0 | 1 | 1.3 * | 0.1–11.4 | |
| No | 27 | 22.9 | 15.1–33.0 | 19 | 45.5 | 27.0–65.4 | 17 | 19.9 | 11.0–33.4 | 9 | 39.8 * | 21.6–61.3 | ||
* p < 0.001; † p < 0.05; ±p < 0.1. The analyses adjusted for age, education, TIS, and uptake of NVP use between W1 and W2 (regardless of vaping history). Caution is warranted in interpreting any differences within or between countries due to small sample sizes in some cases.