Characteristics of study population of rubber workers (n=36 442)
| Characteristic | n (%) | Person-years |
| Age in 1967 (at study start) (years) | ||
| 35–44 | 11 595 (31.8) | 387 592 |
| 45–54 | 13 220 (36.3) | 315 067 |
| 55–64 | 10 852 (29.8) | 170 706 |
| 65+ | 775 (2.1) | 8822 |
| Decade of employment start | ||
| <1930 | 1801 (4.9) | 29 533 |
| 1930–1939 | 3570 (9.8) | 76 074 |
| 1940–1949 | 7798 (21.4) | 180 841 |
| 1950–1959 | 12 439 (31.1) | 314 239 |
| 1960–1966 | 10 834 (29.7) | 281 500 |
| Industry sector | ||
| Tyre | 14 906 (40.9) | 362 093 |
| Non-tyre | 21 536 (59.1) | 520 094 |
| Departments | ||
| Job groups | ||
| Crude materials | ||
| Storeman | 178 (0.5) | 3767 |
| Compounding/pre-processing | 3574 (9.8) | 83 431 |
| Latex mixing | 424 (1.2) | 9586 |
| Extruding and calendaring | 3461 (9.5) | 82 664 |
| Component building | 4037 (11.1) | 101 068 |
| Curing/vulcanising | ||
| Moulding | 4710 (12.9) | 118 909 |
| Finishing | ||
| Inspection | 1954 (5.4) | 46 239 |
| Finished goods | 2375 (6.5) | 52 914 |
| Site workers | 2056 (5.6) | 42 105 |
| Engineering | 6137 (16.8) | 144 483 |
| Canteens | 30 (0.1) | 606 |
| Factory operations | 5728 (15.7) | 146 273 |
| Commercial staff | 485 (1.3) | 13 381 |
| Engineering staff | 378 (1.0) | 10 490 |
| Technical staff | 915 (2.5) | 26 272 |
| Vital status | ||
| Alive* | 2125 (5.8%) | 99 110 |
| Dead | 34 181 (93.8%) | 781 001 |
| Dead, no cause of death | 1939 (5.3%) | 38 976 |
| Embarked/registration cancelled | 136 (0.4%) | 2075 |
| Total† | 36 442 (100) | 882 187 |
*Includes 125 deaths where date of death >31 December 2015.
†Excludes 4425 untraced individuals from the original study (n=40 867).