Characteristics of a cohort of 3538 male chemical workers exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin stratified by cancer case status
| Characteristic | Cases, n (%) | Non-cases, n (%) |
| Birth cohort (quartiles) | ||
| <1922 | 160 (63) | 684 (21) |
| 1922–<1933 | 67 (26) | 802 (24) |
| 1933–<1944 | 25 (10) | 883 (27) |
| 1944+ | 4 (2) | 913 (28) |
| Mean (SD) age at entry, years | 36 (10) | 29 (9) |
| Mean (SD) age at exit, years | 62 (11) | 56 (13) |
| Mean (SD) duration of employment, years | 17 (13) | 11 (12) |
| Mean (SD) cumulative exposure | 18 784 (70 227) | 9198 (58 965) |