Characteristics of coke oven and control workers
| Parameters | Control (n = 50) | Coke oven (n = 50) | p value |
|---|---|---|---|
| n, number of subjects; NS, not significant. | |||
| *Mean (SD). | |||
| Age (years)* | 43.6 (6.3) | 40.2 (7.8) | 0.017 |
| Years of exposure to PAHs* | 16.0 (7.9) | ||
| Number of smokers (questionnaire) | 24 (48%) | 33 (66%) | NS |