Summary data of study population
| Controls | Coke oven workers | |
| Number | 58 | 162 |
| Age (y, mean (SD)) | 39 (8) | 39 (8) |
| Employment (y, mean (SD)) | 12 (8) | 10 (7) |
| Smokers (%) | 41 (71) | 108 (67) |
| Cigarettes/day in smokers (mean (SD)) | 13 (9) | 17 (10)1-150 |
| Drinkers (%)1-152 | 17 (29) | 63 (39) |
| Ethanol consumption in drinkers (g/day, mean (SD)) | 34 (50) | 42 (38) |