Table 1.
Descriptive Statistics of Participant Characteristics in Study Samplea
| Participant Characteristics | N(%) or M(SD) |
|---|---|
| Demographics | |
| Female gender, N (%) | 35 (35.0%) |
| Age, years, mean (SD), | 25.4 (4.4) |
| Race/ethnicity, N (%) | |
| Hispanic | 22 (22.0%) |
| White | 29 (29.0%) |
| Black | 25 (25.0%) |
| Asian | 15 (15.0%) |
| Other | 9 (9.0%) |
| Tobacco Product Use Characteristics | |
| Combustible cigarette smoking status,b N (%) | |
| Never smoker | 22 (22.0%) |
| Former smoker | 25 (25.0%) |
| Current smoker | 53 (53.0%) |
| Preference for menthol combustible cigarettes, N (%) | |
| Among former smokers | 10 (66.7%) |
| Among current smokers | 23 (43.4%) |
| Salivary cotinine semi-quantitative level,c mean (SD) | 2.85 (1.22) |
| Carbon monoxide, ppm,d mean (SD) | 5.00 (5.51) |
| PSECDI e-Cigarette Dependence score, mean (SD) | 7.01 (4.51) |
| Puffs per day, mean (SD) | 74.3 (124.3) |
| Nicotine concentration typically used, mean (SD) | 8.77 (13.92) |
| Duration of e-cigarette use, months, mean (SD) | 19.8 (14.4) |
| e-Cigarette device type typically used, N (%) | |
| Cig-a-like | 12 (12%) |
| Tank/pen | 30 (30%) |
| Advanced personal vaporizer/mod | 58 (58%) |
| Preferred e-cigarette flavor,e N (%) | |
| Fruit or Dessert | 80 (80.0%) |
| Menthol or Mint | 13 (13.0%) |
| Tobacco | 7 (7.0%) |
N=100
Never smokers: smoked less than 100 cigarettes lifetime, Former smokers: smoked ≥100 cigarettes but did not smoke in past 30 days; Current smokers: smoked ≥100 cigarettes lifetime and smoked in past 30 days.
NicAlert Strip (Range 1-6; 0=0-10, 1=10-30, 2=30-100, 3=100-200, 4=200-500, 5=500-1000, 6=>1000 ng/mL).
Carbon monoxide was significantly higher in participants who were current smokers (M[SD]=7.04[5.95]) than former (M[SD]=2.40 [3.04]) and never (M[SD]=3.05[4.73]) smokers (ps<.001)
Response to question, “Which e-cigarette liquid flavor do you usually use?” “Tobacco-flavored” responses were categorized in the tobacco category. “Menthol” or “Mint” responses were categorized as menthol/mint. “Candy (e.g., bubble gum, liquorish),” “Fruit (e.g., strawberry, banana),” or “Chocolate or other sweets (e.g., caramel, cake batter)” responses were classified as fruit or desert. Other possible responses (e.g., clove, spice, alcohol, unflavored) were not selected by any participants.
PSECDI = Penn State Electronic Cigarette Dependence Index