Controls | Moderate exposure | High exposure | |
---|---|---|---|
Number | 72 | 90 | 279 |
Age, mean (SD) | 43.4 (9.6) | 41.1 (10.1) | 40.2 (9.7) |
Females (%) | 36.4 | 5.3 | 23.2 |
Smokers (%) | 31.9 | 43.3 | 50.5 |
Former smokers (%) | 6.9 | 18.9 | 15.4 |
Never smokers (%) | 61.1 | 37.8 | 34.1 |
Exposure (years), mean (SD) | – | 16.8 (9.5) | 15.6 (8.9) |