Table 1.
Demographic characteristics of workers in the control and exposed groups.
| Variables | Control group (78) | Exposed group (126) | P value |
|---|---|---|---|
| 1-OHP (μmol/mol creatine) | 0.55 ± 0.28 | 9.36 ± 2.14∗∗∗ | <0.001a |
| Age (year) | 32.4 ± 4.9 | 33.6 ± 5.2 | 0.103a |
| Employment time (year) | 12.7 ± 2.5 | 14.1 ± 2.7∗∗∗ | <0.001a |
| Current smokers, yes (%) | 41 (52.6%) | 79 (62.7%) | 0.153b |
| Alcohol users, yes (%) | 18 (23.1%) | 57 (45.2%) | 0.001b |
| MDA (nmol/mL) | 1.23 ± 0.37 | 1.97 ± 0.61∗∗∗ | <0.001a |
| 8-OH-dG (nmol/mol creatinine) | 1.29 ± 0.15 | 2.20 ± 0.19∗∗∗ | <0.001a |
| CTL (μm) | 3.16 ± 0.58 | 7.49 ± 0.89∗∗∗ | <0.001a |
| CTM | 0.85 ± 0.23 | 10.48 ± 3.52∗∗∗ | <0.001a |
| MN (‰) | 1.83 ± 0.51 | 2.78 ± 0.63∗∗∗ | <0.001a |
| CA (N, AR%) | 10, 12.8% | 36, 28.6% | 0.009b |
| IgG (g/L) | 0.36 ± 0.11 | 0.12 ± 0.03∗∗∗ | <0.001a |
| IgA (g/L) | 2.09 ± 0.44 | 1.66 ± 0.44∗∗∗ | <0.001a |
| IgM (g/L) | 1.76 ± 0.69 | 1.62 ± 0.72 | 0.172a |
| IgE (IU/mL) | 173.90 ± 30.24 | 167.76 ± 43.16 | 0.273a |
1-OHP: 1-hydroxypyrene; CTL: comet tail length; CTM: comet tail moment; MN: micronucleus; CA: chromosomal aberrations. Values are shown mean ± SD except where indicated. awhen compared with control by Mann-Whitney test, bwhen compared with control by chi-square test.
***P < 0.001.