Characteristic | Combined plants | Plant 1 | Plant 2 | |||||||
---|---|---|---|---|---|---|---|---|---|---|
 | Total | Men | Women |  |  |  |  | |||
Number of workers | 2572 | 1247 | (48) | 1325 | (52) | 973 | (38) | 1599 | (62) | |
Race, n (%) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   White | 2523 | (98) | 1239 | (99) | 1284 | (97) | 967 | (99) | 1556 | (97) |
   Non-white | 49 | (2) | 8 | (1) | 41 | (3) | 6 | (1) | 43 | (3) |
Vital status as of 12-31-1998, n (%) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Deceased, cause of death known | 787 | (31) | 348 | (28) | 439 | (33) | 305 | (31) | 482 | (30) |
   Deceased, cause of death unknown | 11 | (<1) | 7 | (1) | 4 | (<1) | 5 | (1) | 6 | (<1) |
   Alive | 1743 | (68) | 876 | (70) | 867 | (65) | 655 | (67) | 1088 | (68) |
   Unknown | 31 | (1) | 16 | (1) | 15 | (1) | 8 | (1) | 23 | (1) |
Age at death or date last observed (years) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   mean ± standard deviation | 63.6 ± 13.0 | 59.8 ± 11.8 | 67.1 ± 13.2 | 64.1 ± 12.4 | 63.2 ± 13.4 | |||||
   median (range) | 64.1 (18.5 – 102.0) | 58.6 (19.5 – 95.4) | 69.0 (18.5 – 102.0) | 64.8 (27.4 – 95.4) | 63.8 (18.5 – 102.0) | |||||
Time since last employment (years) b | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   median (range) | 26.5 (0 – 52.6) | 25.8 (0 – 51.8) | 26.8 (0 – 52.6) | 21.5 (0 – 52.6) | 29.5 (0 – 49.0) | |||||
Age at first employment (years) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   mean ± standard deviation | 26.8 ± 10.2 | 25.1 ± 9.3 | 28.3 ± 10.7 | 29.0 ± 9.1 | 25.4 ± 10.5 | |||||
   median (range) | 23.3 (15.0 – 63.7) | 21.8 (15.2 – 63.7) | 25.9 (15.0 – 63.7) | 26.4 (17.1 – 57.2) | 20.5 (15.0 – 63.7) | |||||
Duration of employment, n (%) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   90 days – <5 years | 1261 | (49) | 674 | (54) | 587 | (44) | 338 | (35) | 923 | (58) |
   5 years – <10 years | 448 | (17) | 205 | (16) | 243 | (18) | 201 | (21) | 247 | (15) |
   ≥10 years | 863 | (34) | 368 | (30) | 495 | (37) | 434 | (45) | 429 | (27) |
   median (range) | 5.2 (0.3 – 35.8) | 3.9 (0.3 – 35.8) | 6.1 (0.3 – 35.1) | 8.7 (0.3 – 31.4) | 3.5 (0.3 – 35.8) | |||||
Time since first employment (years), n (%) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   < 10 | 55 | (2) | 36 | (3) | 19 | (1) | 22 | (2) | 33 | (2) |
   10 – <15 | 44 | (2) | 20 | (2) | 24 | (2) | 14 | (1) | 30 | (2) |
   15 – <20 | 64 | (2) | 34 | (3) | 30 | (2) | 28 | (3) | 36 | (2) |
   ≥20 | 2409 | (94) | 1157 | (93) | 1252 | (94) | 909 | (93) | 1500 | (94) |
   median (range) | 36.8 (0.6 – 60.0) | 33.3 (0.6 – 59.5) | 39.6 (1.7 – 60.0) | 33.1 (0.6 – 53.0) | 38.5 (0.6 – 60.0) | |||||
Person-years at risk | 93,623 | 42,826 | 50,797 | 33,834 | 59,789 |