TABLE 3.
Joinpoint regressions testing for trends in e-cigarette and tobacco cigarette purchasing, and purchase locations between 2017 and 2022 by country (International Tobacco Control Youth Tobacco and Vaping Study, Canada, England, and the United States, 2017–2022).
| Product | Canada | England | United States | |||
|---|---|---|---|---|---|---|
| E-Cigarettes | Tobacco cigarettes | E-Cigarettes | Tobacco cigarettes | E-Cigarettes | Tobacco cigarettes | |
| Outcome Variables | AWPC+ (95% CI) | AWPC (95% CI) | AWPC (95% CI) | AWPC (95% CI) | AWPC (95% CI) | AWPC (95% CI) |
| Product Purchasing | 11.7%* (6.7% to 16.9%) | −4.9% (−9.7% to 0.1%) | 15.6%* (11.3% to 0.2%) | 3.7% (−2.5% to 10.3%) | 4.8%* (1.3% to 8.5%) | −19.7%* (−26.1% to −12.7%) |
| Purchase Locations | ||||||
| Vape shop/tobacco specialty shop | −1.1% (−2.9% to 0.8%) | 3.7% (−10.2% to 19.7%) | −4.6%* (−6.8% to −2.3%) | 12.5% (−13.8% to 46.7%) | −4.9%* (−7.0% to −2.8%) | −7.5% (−16.7% to 2.7%) |
| Traditional retail store | 11.4%* (0.8% to 23.2%) | −2.2%* (−4.4% to 0.0%) | 15.5%* (9.2% to 22.2%) | 2.2% (−0.5% to 5.1%) | 1.2% (−2.8% to 5.3%) | −6.4%* (−9.4 to −3.3) |
| Internet | −14.6%* (−25.8% to-1.8%) | −14.6%* (−25.8% to −1.8%) | −1.1 (−9.2% to 7.8%) | 12.9% (−18.0% to 55.6%) | −13.3%* (−22.3% to −3.2%) | 1.9% (−37.9% to 67.2%) |
| Friend/family/other | 0.5% (−3.8% to 5.0%) | 0.4% (−15.0% to 18.6%) | 3.1% (−7.0% to 14.3%) | −7.3% (−16.4% to 2.8%) | 9.1% (−9.1% to 31.0%) | 15.7%* (7.8% to 24.2%) |
+AWPC, average wave percentage change.
*Statistically different from zero at the p < 0.05 level.