Table 1.
Descriptive Statistics of Participant Characteristics
| Variable | M (SD) or N (%) |
|---|---|
| Demographics | |
| Female, N (%) | 39 (32.8) |
| Age, M (SD), years | 42.1 (14.4) |
| Race, N (%) | |
| White | 35 (30.2) |
| Black | 46 (39.7) |
| Asian | 9 (7.8) |
| Multiracial | 12 (10.3) |
| Othera | 14 (12.1) |
| Hispanic ethnicity, N (%) | 23 (19.8) |
| Tobacco product use characteristics | |
| Ever combustible cigarette smokers, N (%)b | 105 (88.2) |
| Current e-cigarette vaping status, N (%)c | 66 (55.5) |
| Current other tobacco product use, N (%)d | 27 (25.0) |
| Biomarkers, M (SD) | |
| Carbon monoxide, ppm | 6.4 (5.9) |
| Cotinine semiquantitative levele | 4.0 (1.6) |
| Combustible cigarettes | |
| Age started smoking regularly, M (SD), yearsf | 18.7 (6.9) |
| Current cigarettes/day, M (SD)g | 11.0 (6.8) |
| Cigarettes/day when smoking heaviest, M (SD)f | 17.8 (10.9) |
| Days smoked in past 30g | 23.4 (10.7) |
| FTCD, M (SD)g | 4.4 (2.2) |
| Usually smoke(d) menthol cigarettes, N (%)f | 47 (53.4) |
| E-cigarettes | |
| PSECD, M (SD)h | 10.1 (4.9) |
| Puffs per day, M (SD)h | 85.5 (90.4) |
| Nicotine concentration typically used, M (SD), mg/mL,h | 29.3 (20.6) |
| Duration of e-cigarette use, M (SD), monthsi | 21 (16.2) |
| Days vaped in past 30h | 23.4 (8.6) |
| E-cigarette device type typically used, N (%)i | |
| Cig-a-like | 2 (3.3) |
| Tank/pen | 5 (8.2) |
| Advanced personal vaporizer/mod | 11 (18.0) |
| Pod-based | 34 (55.7) |
| Other | 9 (14.8) |
| Preferred e-cigarette flavor, N (%)i | |
| Fruit | 28 (45.9) |
| Dessert | 7(11.5) |
| Mint | 6 (9.8) |
| Menthol | 9 (14.8) |
| Tobacco | 9 (14.8) |
| Other | 2 (3.3) |
Note. FTCD = Fagerstrom test for cigarette dependence; PSECD = Penn state electronic cigarette dependence index; ppm = parts per million. Overall N = 119. Sample size ranges from 110 to 119 across variables due to differential patterns of missing data across variables.
Includes “American Indian or Alaskan Native,” “Middle Eastern,” “Pacific Islander (including Hawaii),” and “Other.”
Smoked ≥100 cigarettes lifetime and in the past 30 days (n = 22 were former smokers who did not smoke at all in past month, n = 83 were current [past-month] smokers).
Vapes ≥3 days per week for past ≥2 months.
Past 30-day use of “chewing tobacco, snuff or dip,” “dissolvable tobacco product,” “bidis,” “kreteks,” “regular pipe tobacco,” “snus,” “big cigars,” “little cigars or cigarillos,” or “hookah water pipe.”
NicAlert Strip (range: 1–6; 0 = 0–10, 1 = 10–30, 2 = 30–100, 3 = 100–200, 4 = 200–500, 5 = 500–1,000, 6 ≥ 1,000 ng/mL).
Former or current smokers only (n = 105). Ns range 83105 due to missing data across variables.
Current smokers only (n = 83). Ns range 80–83 due to missing data across variables.
Current vapers only (n = 66). Ns range 54–66 due to missing data across variables.
Ever vapers only (n = 64). Ns range 54–64 due to missing data across variable.