TABLE 1.
Demographic characteristics of study participants
| Non-smokers (n = 12) | Cigarette smokers (n = 12) | E-cig users (n = 12) | Dual smokers (n = 12) | |
|---|---|---|---|---|
| Age, years | ||||
| Mean (SD) | 35.67 (12.46) | 40.25 (15.96) | 34.92 (11.45) | 39.42 (11.81) |
| Range (years) | (22 to 57) | (24 to 75) | (22 to 53) | (25 to 62) |
| Sex, n (%) | ||||
| Male | 2 (16.7%) | 5 (41.7%) | 10 (83.3%) | 7 (58.3%) |
| Female | 10 (83.3%) | 7 (58.3%) | 2 (16.7%) | 5 (41.7%) |
| Race (n) | ||||
| White | 5 | 7 | 8 | 4 |
| African American | 4 | 2 | 1 | 4 |
| Asian | 0 | 3 | 1 | 2 |
| American Indian | 1 | 0 | 0 | 1 |
| Other (mixed) | 2 | 0 | 2 | 1 |
| Ethnicity, n | ||||
| Hispanic | 1 | 1 | 0 | 0 |
| Non-Hispanic | 11 | 11 | 12 | 12 |