From: Biomarkers of oxidative stress and its association with the urinary reducing capacity in bus maintenance workers
All subjects
Non-smoker
Smoker
Number of workers
32
23
9
Age, year (mean ± SD)
43.1 ± 9.3
43.0 ± 9.0
43.3 ± 10.8
BMI, kg/m2 (mean ± SD)
25.2 ± 3.6
25.6 ± 3.2
24.2 ± 4.5
Years of employment (mean ± SD)
11.8 ± 9.2
11.5 ± 9.1
12.7 ± 9.7