Table 2.
General characteristics of the coke oven workers in each exposure group.
| Exposure group
|
||||
|---|---|---|---|---|
| Variable | Low (n = 33) | Intermediate (n = 35) | High (n = 33) | p-Value |
| Age (years) | 39.53 ± 1.26 | 39.16 ± 2.46 | 39.72 ± 1.99 | 0.527a |
| Years worked | 18.49 ± 3.42 | 16.72 ± 6.31 | 18.90 ± 4.98 | 0.202a |
| Current smokers, yes/no (% yes) | 24/9 (72.7) | 28/7 (80.0) | 25/8 (75.8) | 0.778b |
| Cigarette smoking (pack-years) | 311.59 ± 260.90 | 367.09 ± 265.09 | 317.12 ± 216.17 | 0.610a |
| Alcohol users, yes/no (% yes) | 14/19 (42.4) | 13/22 (37.1) | 17/16 (51.5) | 0.484b |
| 1-OHP [μmol/mol creatinine [GM (GSD)] | 0.60 (0.25) | 4.06 (0.27) | 13.33 (0.90) | 0.000a |
Abbreviations: GM, geometric mean; GSD, geometric standard deviation. Values shown are mean ± SD except where indicated.
a
One-way ANOVA for differences between the different exposure groups.
b
Chi-square tests for differences in the distribution frequencies between the different exposure groups.