Table 2.
Population trends in cigarette smoking and use of electronic cigarettes among 8th–10th grade youth in Iceland, 2015–2018.
| 2015% | 2016% | 2017% | 2018% | Exp. β for trend (95% CI) | |
|---|---|---|---|---|---|
| 8th grade students | |||||
| Ever smoking | 4.7 | 6.4 | 3.6 | 4.8 | 0.95 (0.88–1.02) |
| Current smoking | 1.2 | 1.6 | 0.8 | 1.2 | 0.95 (0.82–1.10) |
| Daily smoking | 0.3 | 0.7 | 0.3 | 0.4 | 0.92 (0.73–1.15) |
| Ever E-cigarettes | 6.9 | 9.3 | 12.9 | 18.6 | 1.46 (1.35–1.58) |
| Current E-cigarettes | n/a | 2.9 | 3.9 | 6.9 | 1.62 (1.37–1.91) |
| Daily E-cigarettes | n/a | 0.7 | 1.0 | 2.5 | 2.02 (1.53–2.89) |
| 9th grade students | |||||
| Ever smoking | 9.5 | 10.8 | 8.5 | 8.8 | 0.95 (0.89–0.1.02) |
| Current smoking | 3.7 | 2.7 | 2.8 | 2.2 | 0.84 (0.75–0.95) |
| Daily smoking | 1.5 | 1.2 | 1.2 | 0.8 | 0.81 (0.70–0.95) |
| Ever E-cigarettes | 12.0 | 19.2 | 21.8 | 30.5 | 1.44 (1.37–1.53) |
| Current E-cigarettes | n/a | 5.8 | 9.3 | 13.7 | 1.59 (1.45–1.75) |
| Daily E-cigarettes | n/a | 1.7 | 2.8 | 5.6 | 1.91 (1.65–2.22) |
| 10th grade students | |||||
| Ever smoking | 14.9 | 16.3 | 13.3 | 14.4 | 0.96 (0.91–1.02) |
| Current smoking | 5.7 | 5.8 | 4.2 | 5.4 | 0.95 (0.87–1.03) |
| Daily smoking | 2.5 | 2.7 | 1.7 | 2.2 | 0.85 (0.76–0.94) |
| Ever E-cigarettes | 17.0 | 26.1 | 33.7 | 40.7 | 1.48 (1.41–1.56) |
| Current E-cigarettes | n/a | 8.7 | 14.8 | 22.5 | 1.74 (1.57–1.94) |
| Daily E-cigarettes | n/a | 3.0 | 5.2 | 10.2 | 1.94 (1.73–2.17) |