Table 2. Bivariate Associations, Stratified by Category of E-Cigarette Susceptibility and Use, Among High School Students Not Susceptible to Smoking Cigarettes, Weighted Estimates, North Carolina Youth Tobacco Survey, 2015a .
| Variable | Not Susceptible to Using E-Cigarettes (n = 1,208) | Susceptible to Using E-Cigarettes (n = 179) | Ever E-Cigarette User (n = 172) | Current E-Cigarette User (n = 68) | P Valueb |
|---|---|---|---|---|---|
| Sex | |||||
| Female | 610 (51.1) | 91 (49.3) | 84 (47.8) | 33 (54.3) | .82 |
| Male | 598 (48.9) | 88 (50.7) | 88 (52.2) | 35 (45.7) | |
| Age, mean (SE), y | 15.5 (0.1) | 15.5 (0.1) | 15.9 (0.1) | 16.1 (0.1) | <.001 |
| Race/ethnicity | |||||
| Non-Hispanic white | 666 (50.7) | 101 (51.7) | 96 (52.8) | 36 (47.6) | .03 |
| Non-Hispanic black | 302 (28.9) | 49 (35.8) | 56 (37.8) | 22 (38.6) | |
| Hispanic | 161 (11.4) | 24 (10.2) | 15 (6.9) | 8 (7.5) | |
| Non-Hispanic other | 79 (8.8) | 5 (2.3) | 5 (2.5) | 2 (6.3) | |
| Exposure to e-cigarette vapor in indoor or outdoor public places in the past 7 days | |||||
| No | 1,043 (87.7) | 135 (78.0) | 133 (78.6) | 27 (37.1) | <.001 |
| Yes | 165 (12.3) | 44 (22.0) | 39 (21.4) | 41 (62.9) | |
| Exposure to e-cigarettes at home | |||||
| No | 1,165 (96.6) | 167 (93.5) | 153 (88.6) | 61 (85.5) | <.001 |
| Yes | 43 (3.4) | 12 (6.5) | 19 (11.4) | 7 (14.5) | |
| Exposure to online tobacco advertising (including e-cigarettes),c mean rating (SE) | 2.5 (0.04) | 2.4 (0.08) | 2.5 (0.08) | 2.7 (0.1) | .17 |
| Perceived harm, mean rating (SE) | |||||
| Of e-cigarettesd | 2.3 (0.03) | 1.9 (0.08) | 1.8 (0.07) | 1.5 (0.05) | <.001 |
| Of secondhand e-cigarette vapore | 3.1 (0.03) | 2.7 (0.07) | 2.5 (0.07) | 2.0 (0.09) | <.001 |
Abbreviation: e-cigarette, electronic cigarette.
Values are number (weighted percentage) unless otherwise indicated. Data are from 1,627 high school students not susceptible to smoking cigarettes.
χ2 tests for categorical variables and analysis of variance (ANOVA) tests for continuous variables.
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 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.