Table 4.
Summary of Hierarchical Multiple Regression Analysis for Variables Predicting HSI-cig and HSI-nic
| HSI-cig | HSI-nic | |||||
|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 1 | Model 2 | Model 3 | |
| Variable | β | β | β | β | β | β |
| Sex | –.01 | .02 | –.01 | –.08* | –.05 | –.03 |
| Age | .20* | .03 | .02 | .04 | –.14* | –.15* |
| Race | –.02 | .02 | .03 | –.04 | .01 | .01 |
| Ethnicity | .06* | .02 | .02 | .07* | .03 | .03 |
| Marital status | .00 | –.04 | –.02 | .02 | –.03 | –.02 |
| Education | –.11* | –.09* | –.09* | –.06* | –.04 | –.04 |
| Income | –.08* | –.07* | –.04 | –.02 | –.01 | –.02 |
| Years smoking | .08* | .07* | .05 | .05 | ||
| HSI pre-vaping | .40* | .41* | .43* | .41* | ||
| Number days vaping | –.26* | .16* | ||||
| Puffs per e-cigarette session | .04 | .08* | ||||
| Nicotine strength | .11* | .09* | ||||
| Months using e-cigarettes | –.04 | .11* | ||||
| R2 | .050 | .193 | .274 | .016 | .182 | .233 |
| F for change in R2 | 20.384* | 230.135* | 72.615* | 7.026* | 262.669* | 44.465* |
HSI: Heaviness of Smoking Index.
*p < .008