Characteristics of the asbestos-exposed workers
| Mean (SD) or n (%) | |
|---|---|
| Age, years | 63.2 (7.3) |
| Male | 935 (98.3%) |
| Smoking history | |
| Never smoker | 135 (14.2%) |
| Ex-smoker | 595 (62.6%) |
| Current smoker | 221 (23.2%) |
| Pack years | 20.4 (16.7) |
| Years of asbestos exposure | 23.9 (10.7) |
| Interstitial lung fibrosis | |
| RS=0 | 201 (21.1%) |
| 0<RS<1 | 434 (45.6%) |
| 1≤RS<2 | 234 (24.6%) |
| 1≤RS<2 | 72 (7.6%) |
| RS≥3 | 10 (1.1%) |
| Visceral pleural fibrosis (n=941) | 131 (13.9%) |
| Yes | 131 (13.9%) |
| No | 810 (86.1%) |
| Pleural plaques | |
| Greatest thickness (n=949) | 1.88 (0.67) |
| Extent, cm2 (n=947) | 104.4 (72.5) |
| Calcification (n=939) | 1.39 (0.94) |
n=951 except as noted.
RS, radiological score.