Table 3. Multivariable Logistic Regressions for E-Cigarette Use Among High School Students Not Susceptible to Smoking Cigarettes, Weighted Estimates, North Carolina Youth Tobacco Survey, 2015a .
| Variable | Model A: Susceptible to Using E-Cigarettes (n = 179) vs Not Susceptible (n = 1,208) | Model B: Ever E-Cigarette Use (n = 172) vs Susceptible to Using e-Cigarettes (n = 179) | Model C: Current E-Cigarette Use (n = 68) vs Susceptible to Using e-Cigarettes (n = 179) | Model D: Current E-Cigarette Use (n = 68) vs Ever Use (n = 172) |
|---|---|---|---|---|
| Sex | ||||
| Female | 1 [Reference] | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Male | 0.94 (0.64–1.36) | 1.12 (0.63–1.99) | 0.61 (0.22–1.72) | 0.71 (0.31–1.63) |
| Age | 1.00 (0.84–1.19) | 1.31 (1.03–1.67)b | 1.99 (1.41–2.81)b | 1.32 (1.04–1.69)b |
| Race/ethnicity | ||||
| Non-Hispanic white | 1 [Reference] | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Non-Hispanic black | 1.42 (0.87–2.33) | 1.13 (0.61–2.09) | 2.29 (0.91–5.77) | 1.48 (0.64–3.43) |
| Hispanic | 1.03 (0.58–1.85) | 0.77 (0.34–1.72) | 1.68 (0.48–5.93) | 1.49 (0.54–4.12) |
| Non-Hispanic other | 0.33 (0.11–0.97)b | 1.13 (0.33–3.84) | 5.55 (1.41–21.91)b | 2.62 (0.52–13.08) |
| Exposure to e-cigarette vapor in indoor or outdoor public places in the past 7 days | ||||
| No | 1 [Reference] | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Yes | 1.96 (1.33–2.91)b | 0.78 (0.43–1.42) | 7.82 (3.35–18.27)b | 5.69 (2.57–12.61)b |
| Exposure to e-cigarettes at home | ||||
| No | 1 [Reference] | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Yes | 1.55 (0.79–3.07) | 1.99 (0.85–4.64) | 2.59 (0.80–8.36) | 0.93 (0.18–4.71) |
| Exposure to online tobacco advertising (including e-cigarettes)c | 0.84 (0.65–1.09) | 1.24 (0.91–1.70) | 1.29 (0.82–2.04) | 1.17 (0.76–1.78) |
| Perceived harm | ||||
| Of e-cigarettesd | 0.79 (0.65–0.96)b | 0.85 (0.65–1.10) | 0.31 (0.14–0.66)b | 0.43 (0.25–0.72)b |
| Of secondhand e-cigarette vapore | 0.73 (0.62–0.86)b | 0.79 (0.63–0.98)b | 0.46 (0.29–0.73)b | 0.71 (0.53–0.94)b |
Abbreviation: e-cigarette, electronic cigarette.
Data are from 1,627 high school students not susceptible to smoking cigarettes.
Significant at P < .05.
Rated on a 5-point scale. Participants were asked, “When you are using the Internet, how often do you see ads for tobacco products, including electronic cigarettes or e-cigarettes?” Response options were on a 5-point scale: 1, never or “I do not use the Internet”; 2, rarely; 3, sometimes; 4, most of the time; and 5, always.
Rated on a 4-point scale. Participants were asked, “How harmful are electronic cigarettes to your health?” Response options were 1, not sure or not at all harmful; 2, somewhat harmful; 3, very harmful; and 4, extremely harmful.
Rated on a 4-point scale. Participants were asked, “Do you think that breathing vapor from other people’s e-cigarettes is . . . ?” Response options were 1, not harmful at all to one’s health; 2, not very harmful to one’s health; 3, somewhat harmful to one’s health; or 4, very harmful to one’s health.