Table 3.
Logistic regression assessing initiation of e-cigarette use at 12-month follow-up and controlling for age and sex; Youth and Young Adult Panel Study Wave 1 and Wave 5, 2019 (N = 137).
| Predictor variable | Crude OR (95% CI) | P-value | Adjusted OR (95% CI) | P-value |
|---|---|---|---|---|
| Sociodemographic indicators | ||||
| Sex | ||||
| Female | ref | ref | ||
| Male | 0.99 (0.50, 1.96) | .976 | 0.97 (0.49, 1.94) | .932 |
| Age | 0.89 (0.75, 1.06) | .205 | 0.97 (0.49, 1.94) | .930 |
| Race | ||||
| White | 0.74 (0.36, 1.53) | .419 | 0.78 (0.38, 1.62) | .503 |
| Health and social factors | ||||
| General health | ||||
| Excellent/very good | ref | ref | ||
| Good | 0.54 (0.22, 1.29) | .383 | 0.45 (0.18, 1.13) | .088 |
| Fair/poor | 0.75 (0.17, 3.31) | .975 | 0.72 (0.16, 3.32) | .675 |
| Mental health | ||||
| Excellent/very good | ref | ref | ||
| Good | 1.14 (0.50, 2.61) | .383 | 1.22 (0.52, 2.85) | .654 |
| Fair/poor | 1.40 (0.62, 3.20) | .975 | 1.39 (0.59, 3.29) | .453 |
| Stress most days | ||||
| Not at all/not very | ref | ref | ||
| A bit | 0.58 (0.20, 1.70) | .483 | 0.53 (0.17, 1.59) | .254 |
| Quite a bit/extremely | 0.57 (0.19, 1.68) | .449 | 0.52 (0.17, 1.69) | .290 |
| Alcohol use | ||||
| Never | ref | ref | ||
| Not current | 1.81 (0.74, 4.43) | .509 | 1.98 (0.80, 4.89) | .140 |
| Current | 1.93 (0.86, 4.30) | .329 | 2.66 (1.11, 6.41) | .029 |
| Cannabis use | ||||
| Never | ref | ref | ||
| Not current | 3.21 (1.17, 8.81) | .948 | 4.47 (1.45, 13.79) | .009 |
| Current | 9.36 (1.06, 82.94) | .142 | 13.78 (1.42, 134.03) | .024 |
| Friends use e-cigarettes | ||||
| None | ref | ref | ||
| Some or most | 2.39 (1.12, 5.12) | .025 | 2.34 (1.09, 5.02) | .028 |
| Friends smoke | ||||
| None | ref | ref | ||
| Some or most | 2.03 (1.01, 4.08) | .046 | 2.23 (1.09, 4.56) | .028 |
| Friends use cannabis | ||||
| None | ref | ref | ||
| Some or most | 2.84 (1.17, 6.85) | .021 | 3.80 (1.48, 9.72) | .001 |
| Seeing someone use e-cigarettes | ||||
| Never/rarely | ref | ref | ||
| Sometimes | 4.00 (1.31, 12.21) | .241 | 4.12 (1.34, 12.70) | .014 |
| Very often/always | 6.20 (2.10, 18.34) | .004 | 5.97 (1.99, 17.96) | .002 |
| Risk of regularly vaping with nicotine | ||||
| No/slight risk | ref | ref | ||
| Moderate/great risk | 2.01 (0.39, 10.39) | .403 | 2.13 (0.41, 11.13) | .371 |
| Risk of regularly vaping without nicotine | ||||
| No/slight risk | ref | ref | ||
| Moderate/great risk | 0.33 (0.13, 0.86) | .023 | 0.34 (0.12, 0.88) | .027 |
All models were adjusted for age and sex with the exception of the regressions including age (adjusted for sex only) and sex (adjusted for age only) as predictors.