From: Development of breath test for pneumoconiosis: a case-control study
Cases (n = 25) | Controls (n = 154) | |
---|---|---|
Men, % | 68.0 | 46.1 |
Age (yrs.), mean (SD) | 60.0 (9.2) | 50.3 (11.8) |
Duration of stone work (yrs.), mean (SD) | 19.8 (14.5) | 17.6 (13.8) |
BMI (SD) | 25.7 (3.6) | 25.1 (3.9) |
FVC (% of predicted) (SD) | 74.3 (9.5) | 93.8 (14.3) |
FEV1 (% of predicted) (SD) | 75.6 (9.4) | 95.4 (14.4) |
FEV1/FVC (%) (SD) | 83.2 (6.8) | 84.0 (7.7) |
FEF25–75 (% of predicted) (SD) | 72.9 (20.7) | 87.9 (25.0) |
Cigarette smoking | ||
Pack years, mean (SD) | 39.2 (35.6) | 39.0 (24.8) |
Never smoked, %a | 44.0 | 66.2 |
Former smoker, % | 16.0 | 11.0 |
Current smoker, % | 40.0 | 22.7 |
Passive smoking, %b | 60.0 | 40.3 |
Possible exposure to asbestos, %c | 96.0 | 73.4 |