Population characteristics given as mean (SD), duration of exposure and smoking status of cement production workers
| n | 95 |
| Age, years | 41 (13) |
| Height, cm | 179 (7) |
| Body mass index | 28 (4) |
| Duration of cement aerosol exposure, years | 16 (13) |
| Smoking status (%) | |
| Never-smokers | 36 |
| Ex-smokers | 23 |
| Smokers* | 41 |
↵* Including current smokers (n=37) and ex-smokers who stopped less than 1 year before the examinations (n=2).