Table 1.
Baseline characteristics
| TC Smokers | EC Users | Nonusers | P Value (Overall) | |
|---|---|---|---|---|
| n | 37 | 43 | 65 | |
| Age, yr | 26.7 ± 0.9 | 28.0 ± 0.9 | 0.27 | |
| Sex (men/women) | 26/11 | 27/16 | 29/36 | 0.03 |
| BMI, kg/m2 | 24.3 ± 0.4 | 24.6 ± 0.6 | 23.2 ± 0.4 | 0.09 |
| Race | 0.71 | |||
| Asian, n | 9 | 11 | 13 | |
| Black, n | 3 | 2 | 6 | |
| Hispanic, n | 1 | 5 | 9 | |
| Pacific Islander, n | 0 | 0 | 1 | |
| White, n | 23 | 23 | 32 | |
| Not stated, n | 1 | 3 | 4 | |
| Plasma cotinine, ng/ml | 129.1 ± 38.4 | 109.2 ± 54.8* | 0 |
Values are means ± SE. P values for age, body mass index (BMI), and (log) plasma cotinine were computed using one-way ANOVA. P values for sex and race were computed using Fisher’s exact test. EC, electronic cigarette; TC, tobacco cigarette.
*
P = 0.35, TC smokers vs. EC users.