Table 1.
Descriptive Statistics of Participant Characteristics, by Use of E-cigarettes as a Quit-smoking Aid
| Stratified by Use of e-Cigarettes as a Quit-smoking Aid |
||||
|---|---|---|---|---|
| Pooled sample (N = 53) | Yes (N = 31) | No (N = 22) | p-value for test of group difference | |
| Demographics | ||||
| Female Gender, % | 37.7% | 29% | 50% | .12 |
| Age, M (SD), years | 26.45 (4.42) | 26.94 (3.83) | 25.77 (5.14) | .35 |
| Race/Ethnicity, % | ||||
| Hispanic Ethnicity | 18.9% | 19.4% | 18.2% | .80 |
| White | 22.6% | 25.8% | 18.2% | |
| Black | 35.8% | 29.0% | 45.5% | |
| Asian | 11.3% | 12.9% | 9.1% | |
| Other | 11.3% | 12.9% | 9.1% | |
| Tobacco Product Use Characteristics | ||||
| Biomarkers, M (SD) | ||||
| Carbon monoxide, ppm | 7.04 (5.95) | 6.00 (3.83) | 8.50 (6.70) | .13 |
| Salivary cotinine semi-quantitative levela | 3.08 (1.14) | 3.00 (1.21) | 3.18 (1.05) | .57 |
| Combustible cigarettes | ||||
| Age started smoking every day, M (SD), yearsb | 18.77 (3.51) | 18.81 (3.66) | 18.71 (3.35) | .93 |
| Current cigarettes/day, M (SD) | 5.89 (5.67) | 5.63 (5.70) | 6.25 (7.66) | .72 |
| FTCD, M (SD) | 2.45 (1.94) | 2.39 (1.82) | 2.55 (2.13) | .77 |
| Usually smoke menthol cigarettes, % | 43.4% | 54.8% | 27.3% | .05 |
| e-Cigarettes | ||||
| PSECD, M (SD) | 7.34 (4.32) | 7.68 (4.48) | 6.86 (4.13) | .50 |
| Puffs per day, M (SD)c | 57.70 (67.66) | 69.42 (80.62) | 41.18 (39.54) | .14 |
| Nicotine concentration typically used, M (SD) | 11.06 (18.12) | 8.46 (11.07) | 14.71 (24.79) | .22 |
| Duration of e-cigarette use, M (SD), months | 18.42 (15.39) | 19.48 (17.17) | 16.91 (12.71) | .55 |
| e-Cigarette device type typically used, % | ||||
| Cig-a-like | 18.9% | 19.4% | 18.1% | .44 |
| Tank/pen | 35.8% | 29.0% | 45.5% | |
| Advanced personal vaporizer/mod | 45.3% | 51.6% | 36.4% | |
| E-cigarette flavor typically used, % | ||||
| Fruit/dessert | 77.4% | 80.6% | 72.7% | .16 |
| Menthol | 13.2% | 6.5% | 22.7% | |
| Tobacco | 9.4% | 12.9% | 4.5% | |
| Planning to quit smoking in the next 6 months | 41.5% | 64.5% | 9.1% | <.001 |
Note.
a
NicAlert Strip (Range 1–6).
b
One person removed for impossible value.
c
One outlier winsorized. p-value for omnibus group differences from χ2 (categorical variable) or t (continuous variable) test. FTCD = Fagerstrom Test for Cigarette Dependence; PSECD = Penn State Electronic Cigarette Dependence Index; ppm = parts per million. Sample size range from 47–53 across analyses due to differential patterns of missing data across variables.