Table 4.
Multivariable Logistic Regression Assessing Correlates of Ever Using E-Cigarettes Among Cigarette-Naive Adolescentsa
| Average Marginal Effectsc | ||||
|---|---|---|---|---|
| OR (95% CI)b | Prob. (%) | 95% CI | p | |
| Compared to cigarettes, e-cigarettes are… | ||||
| Less harmful | 3.60 (0.83, 15.7) | 1.6 | (0.5, 2.6) | .01 |
| Equally harmful | 0.46 (0.09, 2.34) | 0.3 | (−1.3, 0.6) | .47 |
| More harmful | 1.00 | Reference | ||
| I don’t know enough about these products | 0.52 (0.11, 2.47) | −0.3 | (−1.2, 0.6) | .52 |
| Ever use of other tobacco productsd | ||||
| No | 1.00 | Reference | ||
| Yes | 11.45 (6.96, 18.8) | 4.1 | (2.6, 5.7) | <.001 |
| All tobacco products are dangerous | ||||
| Strongly agree | 1.00 | Reference | ||
| Agree | 1.23 (0.77, 1.98) | 0.2 | (−0.3, 0.7) | .39 |
| Disagree | 0.64 (0.23, 1.75) | −0.3 | (−1.0, 0.3) | .32 |
| Strongly disagree | 1.31 (0.48, 3.57) | 0.3 | (−0.8, 1.3) | .63 |
| Sex | ||||
| Male | 1.00 | Reference | ||
| Female | 1.12 (0.74, 1.69) | 0.1 | (−0.3, 0.5) | .61 |
| Age | ||||
| ≤ 12 | 1.00 | Reference | ||
| 13 | 0.81 (0.38, 1.71) | −0.2 | (−0.7, 0.4) | .57 |
| 14 | 1.30 (0.68, 2.47) | 0.2 | (−0.4, 0.8) | .44 |
| 15 | 1.41 (0.66, 2.99) | 0.3 | (−0.4, 1.1) | .40 |
| 16 | 1.08 (0.55, 2.11) | 0.1 | (−0.5, 0.6) | .83 |
| ≥ 17 | 1.34 (0.75, 2.38) | 0.3 | (−0.2, 0.8) | .31 |
| Race/ethnicity | ||||
| Non-Hispanic White | 1.00 | Reference | ||
| Non-Hispanic Black | 0.71 (0.39, 1.28) | −0.3 | (−0.7, 0.1) | .21 |
| Hispanic | 1.13 (0.67, 1.92) | 0.1 | (−0.4, 0.6) | .66 |
| Non-Hispanic Asian | 1.31 (0.45, 3.78) | 0.3 | (−0.8, 1.4) | .65 |
| Other/multiple | 1.90 (0.89, 4.08) | 0.8 | (−0.3, 1.9) | .18 |
| Family member uses tobacco | ||||
| No | 1.00 | Reference | ||
| Yes | 1.19 (0.69, 2.04) | 0.2 | (−0.3, 0.7) | .52 |
| Parent/guardian discussed not using a tobacco product, past 12 months | ||||
| No | 1.00 | Reference | ||
| Yes | 1.10 (0.71, 1.72) | 0.0 | (−0.3, 0.4) | .66 |
aIncludes cigarette-naive adolescents, those without any prior cigarette use, who had heard of e-cigarettes.
bOdds ratios (ORs) displayed reflect estimates from the weighted multivariate model in which all listed covariates are included, with 95% confidence intervals (CI) calculated by Taylor series linearization to account for the complex survey design.
cAverage marginal effects estimate the average change of altering each covariate (e.g., having used other tobacco products compared to not having used other tobacco products) among the study population.
dOther tobacco use includes use of cigars, dip, pipes, hookah, snus, or dissolvable tobacco products.