Subjects

Workers (n = 50)

Controls (n = 50)

p value

Age (years)

35 ± 6.85

35.51 ± 8.22

0.738

Sex

50 (male)

50 (male)

-

Work history (years)

11.18 ± 6.820

10.16 ± 8.87

0.62

Smoking (years)

0.76 ± 3.305

1.80 ± 4.90

0.216

Smoking (N/day)

0.70 ± 3.284

1.50 ± 4.53

0.315

BMI

25.65 ± 1.94

-

-