Characteristic |
All miners (mean (SD)) |
No silicosis (mean (SD)) |
Silicosis (mean (SD)) |
Subjects (n) | 3010 | 1995 | 1015 |
Year of birth | 1931 (9.2) | 1933 (8.2) | 1926 (8.2) |
Age at first exposure | 25.7 (7.7) | 25.1 (7.7) | 27.0 (7.5) |
Year of first exposure | 1956 (6.1) | 1958 (6.0) | 1953 (5.0) |
Chinese data on CTD exposure (mg/m3-y) | 64.7 (58.3) | 46.9 (43.4) | 99.7 (67.3) |
Chinese total dust concentration4-150 (mg/m3) | 7.5 (6.1) | 6.1 (5.6) | 10.3 (6.0) |
Net years in dust | 9.6 (6.2) | 8.9 (6.3) | 11.0 (5.6) |
Latency period4-151 | 21.3 (8.6) | ||
Age at onset of silicosis | 48.3 (10.1) | ||
Year at onset of silicosis | 1975 (9.1) | ||
Age at last exposure | 41.2 (10.9) | 40.4 (11.4) | 42.9 (9.6) |
Age of leaving work | 53.5 (7.4) | 53.3 (7.2) | 54.0 (7.9) |