TABLE 4.
Results of the multiple logistic regression showing estimates in odds ratios (confidence intervals) for ENDS ever-use, current use, and susceptibility based on the two groups categorization.
| Predictors of ENDS ever-use (n = 521) | B | S.E. | Wald | DF | Sig. | Exp(b) | CI |
| Block 0 (no predictors added) | |||||||
| Constant | 0.165 | 0.088 | 3.541 | 1 | p = 0.060 | 1.180 | |
| Block 1 (adding demographic predictors) | |||||||
| Constant | –0.002 | 0.094 | 0.000 | 1 | p = 0.986 | 0.998 | |
| Adulthood SES | –0.239 | 0.093 | 6.626 | 1 | p = 0.010 | 0.788 | 0.657–0.945 |
| Current smoker | 1.848 | 0.392 | 22.191 | 1 | p < 0.001 | 6.346 | 2.942–13.690 |
| Block 2 (adding psychological predictors) | |||||||
| Constant | 0.021 | 0.096 | 0.048 | 1 | p = 0.827 | 1.021 | |
| Adulthood SES | –0.061 | 0.104 | 0.348 | 1 | p = 0.556 | 0.941 | 0.768–1.153 |
| Current smoker | 1.750 | 0.398 | 19.362 | 1 | p < 0.001 | 5.755 | 2.639–12.548 |
| Anxiety | 0.305 | 0.104 | 8.680 | 1 | p = 0.003 | 1.357 | 1.108–1.662 |
| Conscientiousness–orderliness aspect | –0.300 | 0.098 | 9.429 | 1 | p = 0.002 | 0.741 | 0.612–0.897 |
| O/I–openness aspect | 0.252 | 0.097 | 6.702 | 1 | p = 0.010 | 1.286 | 1.063–1.556 |
|
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| Predictors of ENDS current use (n = 521) | B | S.E. | Wald | DF | Sig. | Exp(b) | CI |
|
| |||||||
| Block 0 (no predictors added) | |||||||
| Constant | –1.527 | 0.114 | 178.031 | 1 | p < 0.001 | 0.217 | |
| Block 1 (adding demographic predictors) | |||||||
| Constant | –1.885 | 0.142 | 176.419 | 1 | p < 0.001 | 0.152 | |
| Adulthood SES | –0.515 | 0.130 | 15.752 | 1 | p < 0.001 | 0.597 | 0.463–0.770 |
| Current smoker | 1.551 | 0.297 | 27.326 | 1 | p < 0.001 | 4.718 | 2.637–8.442 |
| Block 2 (adding psychological predictors) | |||||||
| Constant | –1.956 | 0.149 | 172.400 | 1 | p < 0.001 | 0.141 | |
| Adulthood SES | –0.422 | 0.136 | 9.672 | 1 | p = 0.002 | 0.655 | 0.502–0.855 |
| Current smoker | 1.552 | 0.307 | 25.533 | 1 | p < 0.001 | 4.723 | 2.586–8.625 |
| Agreeableness–politeness aspect | 0.278 | 0.130 | 4.611 | 1 | p = 0.032 | 1.321 | 1.025–1.703 |
| Conscientiousness–orderliness aspect | –0.470 | 0.131 | 12.866 | 1 | p < 0.001 | 0.625 | 0.484–0.808 |
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| Predictors of ENDS susceptibility (two groups) (n = 239) | B | S.E. | Wald | DF | Sig. | Exp(b) | CI |
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| |||||||
| Block 0 (no predictors added) | |||||||
| Constant | –1.121 | 0.151 | 55.006 | 1 | p < 0.001 | 0.326 | |
| Block 1 (adding demographic predictors) | |||||||
| No significant results | |||||||
| Block 2 (adding psychological predictors) | |||||||
| Constant | –1.083 | 0.154 | 49.156 | 1 | p < 0.001 | 0.339 | |
| Conscientiousness | –0.489 | 0.162 | 9.140 | 1 | p = 0.003 | 0.613 | 0.447–0.842 |
A, agreeable; C, conscientiousness; O/I, openness/intellect. For each model, we entered all demographic predictors in Block 1 and all psychological predictors in Block 2. Significant predictors within each block were selected using a forward likelihood ration method. Bolded, significant at the adjusted p < 0.005 (excluding constants).