Vital, demographic, and employment characteristics1-150 of all operating segments of a petroleum company combined, by sex
| Characteristic | Men | Women | Total |
| Alive | 20068 | 7732 | 27800 |
| Dead (n (%) of total) | 6254 (24) | 506 (6) | 6760 (20) |
| Year of entry into follow up (mean) | 1970 | 1972 | 1970 |
| Duration of employment (mean, y) | 19.2 | 9.9 | 17.0 |
| Person-years | 571656 | 179027 | 750683 |
↵1-150 Data as of 1994 or exit from follow up.