Characteristics of the 11 691 Danish firefighters, 1977–2014
| Characteristics | Entire cohort | Part time/volunteer | Full time |
| Eligible for follow-up | 11 691 | 7013 | 4678 |
| Birth year, n (%) | |||
| <1950 | 2667 (23) | 934 (14) | 1733 (37) |
| 1950–1970 | 5211 (45) | 3.171 (45) | 2040 (44) |
| >1970 | 3813 (32) | 2.908 (41) | 905 (19) |
| Attained age at the end of follow-up, mean (SD) | 52 (14.5) | 48 (13.6) | 58 (14.0) |
| Vital status at end of follow-up, n (%) | |||
| Alive | 10 399 (89) | 6614 (94) | 3778 (81) |
| Deceased | 1192 (10) | 347 (5) | 845 (18) |
| Emigrated | 100 (1) | 47 (1) | 53 (1) |
| Disappeared | 0 | 0 | 0 |
| Year of initial employment, n (%) | |||
| <1970 | 1448 (13) | 181 (3) | 1267 (27) |
| 1970–1994 | 4460 (38) | 2306 (33) | 2154 (46) |
| >1994 | 5783 (49) | 4526 (64) | 1257 (27) |
| Duration of employment (years), n (%) | |||
| <1 | 1921 (16) | 737 (11) | 1184 (25) |
| 1–9 | 4215 (36) | 3260 (46) | 955 (20) |
| 10–15 | 2513 (21) | 1695 (24) | 818 (18) |
| >15 | 3042 (26) | 1321 (19) | 1721 (37) |
| Employment in years, mean (SD) | 13 (11.7) | 11 (10.0) | 15 (13.4) |
| Age at initial employment (years), n (%) | |||
| <25 | 4924 (42) | 2131 (30) | 2793 (60) |
| 25–34 | 4270 (37) | 2831 (41) | 1439 (31) |
| ≥35 | 2497 (21) | 2051 (29) | 446 (9) |