Table I.
Demographic characteristics of the study population from a cross-sectional molecular epidemiology study of TCE in China
| Characteristic | Control | Exposed | Low exposed, <12 p.p.m.a | High exposed, ≥12 p.p.m.a |
|---|---|---|---|---|
| Number of subjects | 45 | 80 | 39 | 41 |
| Sex (n, %) | ||||
| Female | 16 (36) | 23 (29) | 15 (38) | 8 (20) |
| Male | 29 (64) | 57 (71) | 24 (62) | 33 (80) |
| Mean age (SD) | 25 (6) | 25 (7) | 24 (5) | 27 (8) |
| BMI (SD) | 22 (3) | 21 (3) | 21 (2) | 22 (3) |
| Smoking (n, %) | ||||
| No | 30 (67) | 46 (58) | 22 (56) | 24 (59) |
| Yes | 15 (33) | 34 (42) | 17 (44) | 17 (41) |
| Alcohol use (n, %) | ||||
| No | 26 (58) | 54 (68) | 26 (67) | 28 (68) |
| Yes | 19 (42) | 26 (32) | 13 (33) | 13 (32) |
| Recent infection (n, %) | ||||
| No | 39 (87) | 65 (81) | 31 (79) | 34 (83) |
| Yes | 6 (13) | 15 (19) | 8 (21) | 7 (17) |
| TCE air exposure mean p.p.m. (SD) | <0.03 | 22.2 (35.9) | 5.2 (3.5) | 38.4 (44.6) |
BMI, body mass index; SD, standard deviation.
aBased on median TCE exposure level in overall study population (80 exposed, 45 control).