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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Int Arch Occup Environ Health. 2019 Jun 3;92(8):1077–1085. doi: 10.1007/s00420-019-01448-x

Table 1.

Demographic characteristics of the study population in a cross-sectional molecular epidemiology study of TCE exposure in China

Controls (n=90) TCE-exposed workers
All (n=74) <12 ppm (n=40) ≥12 ppm (n=34)
Age, mean (SD) 27 (7) 25 (7) 23 (5) 27 (8)
BMI, mean (SD) 22 (3) 21 (3) 21 (2) 22 (3)
Sex, n (%)
 Female 21 (23) 21 (28) 16 (40) 5 (15)
 Male 69 (77) 53 (72) 24 (60) 29 (85)
Current smoking, n (%)
 No 54 (60) 42 (57) 23 (58) 19 (56)
 Yes 36 (40) 32 (43) 17 (42) 15 (44)
Current alcohol use, n (%)
 No 53 (59) 50 (68) 27 (67) 23 (68)
 Yes 37 (41) 24 (32) 13 (33) 11 (32)
Recent infection, n (%)
 No 69 (77) 59 (80) 32 (80) 27 (79)
 Yes 21 (23) 15 (20) 8 (20) 7 (21)
TCE exposure
 TCE air level (ppm), mean (SD) <0.03 18.70 (27.95) 5.36 (3.59) 34.39 (35.27)