Distribution of male Sherritt employees by age and year of entry into the cohort with person-years contribution to the study in parentheses
| Age | Year | |||
|---|---|---|---|---|
| 1954–9 | 1960–9 | 1970–9 | Total | |
| <20 | 25 (905.4) | 128 (3265.9) | 215 (4162.3) | 368 (8333.6) |
| 20–29 | 137 (5110.4) | 352 (8947.9) | 284 (5544.6) | 773 (19602.9) |
| 30–39 | 132 (4773.5) | 120 (3197.9) | 92 (1779.2) | 344 (9750.6) |
| 40–49 | 52 (1694.7) | 47 (1238.0) | 38 (759.7) | 137 (3692.4) |
| 50–59 | 7 (220.1) | 10 (214.5) | 8 (144.1) | 25 (578.7) |
| ⩾60 | 1 (17.2) | 1 (20.3) | 0 (0) | 2 (37.5) |
| Total | 354 (12721.3) | 658 (16884.5) | 637 (12389.9) | 1649 (41995.7) |