Table. Prevalence of Vaping, Overall and by Smoking Status, Among Youths Aged 16 to 19 Years From 2017 to 2019 by Country.
| Groupa | Study participants, weighted No. (%) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Canada | England | US | ||||||||||
| 2017 | 2018 | 2019 | P values between years | 2017 | 2018 | 2019 | P values between years | 2017 | 2018 | 2019 | P values between years | |
| Total sample, No. | 4038 | 3845 | 4135 | 3995 | 3874 | 3493 | 4095 | 4034 | 3981 | |||
| Ever vaped | 1182 (29.3) | 1275 (33.2) | 1680 (40.6) | <.001b; <.001c; <.001d | 1348 (33.7) | 1283 (33.1) | 1260 (36.1) | .61b; .02c; .05d |
1283 (31.3) | 1336 (33.1) | 1734 (43.6) | .14b; <.001c; <.001d |
| Vaped in past 30 d | 340 (8.4) | 463 (12.1) | 738 (17.8) | <.001b; <.001c; <.001d | 347 (8.7) | 351 (9.0) | 439 (12.6) | .59b; <.001c; <.001d |
454 (11.1) | 635 (15.7) | 736 (18.5) | <.001b; .006c; <.001d |
| Vaped in past week | 208 (5.2) | 290 (7.5) | 508 (12.3) | <.001b; <.001c; <.001d | 184 (4.6) | 179 (4.6) | 241 (6.9) | .93b; <.001c; <.001d |
262 (6.4) | 416 (10.3) | 503 (12.6) | <.001b; .007c; <.001d |
| Used e-cigarettes ≥20 d in past 30 d | 74 (1.8) | 92 (2.4) | 236 (5.7) | .06b; <.001c; <.001d |
59 (1.5) | 76 (2.0) | 94 (2.7) | .14b; .08c; <.001d |
89 (2.2) | 154 (3.8) | 267 (6.7) | <.001b; <.001c; <.001d |
| Never smoked | ||||||||||||
| Ever vaped | 373 (13.5) | 500 (18.8) | 697 (24.5) | <.001b; <.001c; <.001d | 284 (11.9) | 277 (12.0) | 337 (15.6) | .93b; .002c; .001d |
363 (13.1) | 434 (15.9) | 672 (25.4) | .015b; <.001c; <.001d |
| Vaped in past 30 d | 63 (2.3) | 124 (4.7) | 195 (6.8) | <.001b; .003c; <.001d | 39 (1.6) | 40 (1.7) | 65 (3.0) | .88b; .014c; .005d |
66 (2.4) | 157 (5.8) | 196 (7.4) | <.001b; .04c; <.001d |
| Vaped in past week | 22 (0.8) | 68 (2.6) | 114 (4.0) | <.001b; .013c; <.001d | 12 (0.5) | 9 (0.4)e | 30 (1.4) | .68b; .008c; .005d |
31 (1.1) | 78 (2.9) | 116 (4.4) | <.001b; .013c; <.001d |
| Used e-cigarettes ≥20 d in past 30 d | 5 (0.2)e | 10 (0.4)e | 27 (1.0) | .13b; .05c; .001d |
4 (0.2)e | 2 (0.1)e | 6 (0.3)e | .46b; .18c; .38d |
11 (0.4) | 33 (1.2) | 49 (1.8) | .005b; . 14c; <.001d |
| Smoking experimentally | ||||||||||||
| Ever vaped | 594 (58.7) | 627 (62.9) | 765 (73.5) | .07b; <.001c; <.001d |
787 (61.2) | 748 (60.0) | 712 (65.9) | .51b; <.01c; .04d |
708 (65.5) | 733 (66.7) | 907 (77.9) | .53b; <.001c; <.001d |
| Vaped in past 30 d | 184 (18.2) | 261 (26.2) | 391 (37.6) | <.001b; <.001c; <.001d | 195 (15.2) | 200 (16.0) | 254 (23.6) | .64b; <.001c; <.001d |
264 (24.4) | 363 (33.1) | 427 (36.7) | <.001b; .14c; <.001d |
| Vaped in past week | 111 (11.0) | 163 (16.3) | 272 (26.1) | .001b; <.001c; <.001d | 97 (7.5) | 104 (8.3) | 127 (11.7) | .54b; .02c; .002d |
146 (13.5) | 247 (22.5) | 292 (25.1) | <.001b; .23c; <.001d |
| Used e-cigarettes ≥20 d in past 30 d | 36 (3.6) | 49 (4.9) | 137 (13.2) | .13b; <.001c; <.001d | 28 (2.1) | 42 (3.4) | 47 (4.3) | .11b; .36c; .01d |
43 (4.0) | 85 (7.8) | 163 (14.0) | .002b; <.001c; <.001d |
| Smoking currently | ||||||||||||
| Ever vaped | 156 (79.8) | 116 (76.7) | 148 (86.7) | .70b; .15c; .35d |
206 (86.7) | 228 (85.0) | 184 (84.9) | .76b; .93c; .69d |
155 (85.4) | 135 (81.3) | 111 (91.0) | .43b; .04c; .16d |
| Vaped in past 30 d | 68 (34.8) | 66 (43.7) | 103 (60.1) | .06b; .003c; <.001d |
85 (35.7) | 104 (38.9) | 107 (49.2) | .70b; .03c; .008d |
100 (55.2) | 94 (56.3) | 81 (66.0) | .89b; .12c; .07d |
| Vaped in past week | 56 (28.8) | 51 (33.8) | 76 (44.7) | .22b; .07c; .006d |
53 (22.2) | 61 (22.7) | 72 (33.1) | .94b; .02c; .02d |
66 (36.3) | 76 (45.7) | 67 (54.7) | .12b; .20c; .002d |
| Used e-cigarettes ≥20 d in past 30 d | 27 (13.8) | 26 (17.0) | 42 (24.6) | .47b; .06c; .02d |
19 (8.0) | 31 (11.6) | 34 (15.6) | .20b; .32c; .03d |
25 (13.9) | 28 (17.0) | 30 (24.8) | .44b; .24c; .04d |
a
Those who reported formerly smoking were not analyzed because of the small sample size.
b
Comparison between 2017 and 2018 in prevalence of measure within group and country, from logistic regression models adjusting for sex, age group (16-17 years vs 18-19 years), and race/ethnicity (white vs other).
c
Comparison between 2018 and 2019 in prevalence of measure within country.
d
Comparison between 2017 and 2019 in prevalence of measure within country.
e
High variability; interpret with caution.