Table 2.
Multinomial Logistic Regression Analysis Comparing Each Class to Class 4
| Covariate | B | OR (95% CI) |
|---|---|---|
| Class 1 versus Class 4 | ||
| Sex | ‒0.01 | 0.99 (0.71, 1.38) |
| Black race | ‒0.13 | 0.88 (0.57, 1.34) |
| Other race | ‒0.12 | 0.89 (0.55, 1.46) |
| Non-Hispanic | ‒0.54 | 0.58** (0.41, 0.83) |
| Peer e-cigarette use | 0.21 | 1.24*** (1.13, 1.35) |
| Household e-cigarette use | ‒0.05 | 0.95 (0.61, 1.51) |
| Depressive symptoms | 0.01 | 1.01 (0.99, 1.02) |
| Sensation seeking | 0.03 | 1.03* (1.01, 1.06) |
| Cigarette smoking | 1.31 | 3.71*** (1.99, 6.93) |
| Perceived e-cigarette benefits | 0.03 | 1.03 (0.99, 1.06) |
| Positive e-cigarette expectations | 0.19 | 1.21*** (1.15, 1.26) |
| Alcohol use | 0.93 | 2.55*** (1.69, 3.83) |
| Cigar use | 0.54 | 1.72 (0.80, 3.69) |
| Class 2 versus Class 4 | ||
| Sex | ‒0.11 | 0.90 (0.58, 1.38) |
| Black race | ‒0.52 | 0.60 (0.32, 1.11) |
| Other race | ‒0.31 | 0.73 (0.36, 1.48) |
| Non-Hispanic | 0.55 | 1.74 (0.99, 3.05) |
| Peer e-cigarette use | 0.18 | 1.20** (1.08, 1.34) |
| Household e-cigarette use | ‒0.14 | 0.87 (0.49, 1.55) |
| Depressive symptoms | 0.01 | 1.01 (0.99, 1.03) |
| Sensation seeking | 0.10 | 1.11*** (1.07, 1.15) |
| Cigarette smoking | 0.79 | 2.21* (1.01, 4.82) |
| Perceived e-cigarette benefits | ‒0.01 | 0.99 (0.95, 1.04) |
| Positive e-cigarette expectations | 0.16 | 1.17*** (1.10, 1.24) |
| Alcohol use | 1.48 | 4.39*** (2.71, 7.11) |
| Cigar use | 0.87 | 2.39* (1.05, 5.45) |
| Class 3 versus Class 4 | ||
| Sex | 0.21 | 1.23 (0.94, 1.61) |
| Black race | ‒0.78 | 0.46*** (0.30, 0.70) |
| Other race | ‒0.49 | 0.61* (0.40, 0.94) |
| Non-Hispanic | 0.09 | 1.09 (0.78, 1.53) |
| Peer e-cigarette use | 0.08 | 1.09 (0.99, 1.20) |
| Household e-cigarette use | ‒0.02 | 0.98 (0.65, 1.48) |
| Depressive symptoms | 0.02 | 1.02* (1.01, 1.04) |
| Sensation seeking | 0.03 | 1.03** (1.01, 1.06) |
| Cigarette smoking | 0.22 | 1.25 (0.58, 2.72) |
| Perceived e-cigarette benefits | 0.03 | 1.03* (1.01, 1.06) |
| Positive e-cigarette expectations | 0.07 | 1.08*** (1.04, 1.12) |
| Alcohol use | 0.51 | 1.66* (1.11, 2.49) |
| Cigar smoking | ‒0.13 | 0.88 (0.35, 2.23) |
Notes: Covariate values are as follows: Sex (1=female), Race dummy coded with White as reference group (Black, 0=No 1=Yes; Other, 0=No 1=Yes), Ethnicity (0=Hispanic, 1=Non-Hispanic), Cigarette smoking (0=Never, 1=Ever), Alcohol use (past 6 months, 0=No 1=Yes), and Cigar smoking (past 6 months, 0=No 1=Yes). Boldface indicates statistical significance
*
p<0.05;
**
p<0.01;
***
p<0.0001.