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Table 1 Vital status and demographic characteristics of PCB-exposed workers stratified by gender and plant a

From: Update: cohort mortality study of workers highly exposed to polychlorinated biphenyls (PCBs) during the manufacture of electrical capacitors, 1940-1998

Characteristic Combined plants Plant 1 Plant 2
  Total Men Women     
Number of workers 2572 1247 (48) 1325 (52) 973 (38) 1599 (62)
Race, n (%)           
   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 (%)           
   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)           
   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           
   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)           
   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 (%)           
   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 (%)           
   < 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
  1. a Number in parentheses indicates percent of total number of workers available for analysis.
  2. b Employment refers to time worked during the time period when PCBs were in use at the plants.