Descriptive characteristics of firefighters and police officers in the ODSS cohort, 1983–2020
| CCDO 6111 Firefighters | CCDO 6112 Police officers | ODSS cohort | |
| Total, n | 13 642 | 22 595 | 2 368 226 |
| Major industry group, n | |||
| Federal | 259 | 333 | 34 596 |
| Provincial | 841 | 6263 | 46 531 |
| Municipal | 11 376 | 17 383 | 118 008 |
| Male, % | 96 | 83 | 65 |
| Year of birth, median (IQR) | 1958 (1949–1968) | 1964 (1953–1973) | 1960 (1950–1970) |
| Years of follow-up, median (IQR) | 21 (11–30) | 20 (10–30) | 23 (12–31) |
| Age at start of follow-up, median (IQR), years | 38 (32–45) | 34 (29–42) | 34 (25–45) |
| Age at end of follow-up, median (IQR), years | 59 (50–68) | 55 (46–65) | 58 (49–68) |
CCDO, Canadian Classification Dictionary of Occupation; IQR, Interquartile Range; n, number of workers; ODSS, Occupational Disease Surveillance System.