Total number of workers | 1256 | 1244 | 551 | 21 | 3072 |
Vital status through 31 December 2001 | | | | | |
Alive | 373 (29.7%) | 339 (27.3%) | 129 (23.4%) | 5 (23.8%) | 846 (27.5%) |
Dead, cause of death known | 841 (67.0%) | 647 (52.0%) | 345 (62.6%) | 8 (38.1%) | 1841 (59.9%) |
Dead, cause of death unknown | 27 (2.1%) | 50 (4.0%) | 39 (7.1%) | 4 (19.0%) | 120 (3.9%) |
Lost to follow-up | 15 (1.2%) | 208 (16.7%) | 38 (6.9%) | 4 (19.0%) | 265 (8.6%) |
Person-years at risk | | | | | |
Vital status through 2001* | 49409.8 | 49163.9 | 19180.9 | 758.0 | 118512.6 |
Vital status through 1990† | 43898.8 | 43743.8 | 17406.1 | 674.6 | 105723.3 |
Age at death, years median (range) | 64.5 (18.1–95.8) | 73.4 (22.6–101.0) | 61.0 (22.1–96.5) | 66.2 (47.5–90.0) | 67.1 (18.1–101.0) |
Age at date last observed, years median (range) | 66.6 (18.1–95.8) | 74.1 (16.9–101.0) | 63.3 (16.9–96.5) | 72.8 (21.1–90.0) | 68.8 (16.9–101.0) |
Cumulative exposure, fibre-years/ml median (range) | 4.4 (0.1–699.8) | 4.2 (0.2–317.1) | 14.5 (0.4–682.7) | 5.9 (0.5–216.0) | 5.5 (0.1–699.8) |
Duration of employment, years median (range) | 1.1 (0.1–46.8) | 0.9 (0.1–43.7) | 1.5 (0.1–43.8) | 0.9 (0.1–30.9) | 1.1 (0.1–46.8) |