| Variable* | 1st survey (2009) n = 3,067 (%) |
2nd survey (2015) n = 2,070 (%) |
3rd survey (2021) n = 1,678 (%) |
|---|---|---|---|
| Age, years | |||
| 24-39 | 805 (26.2) | 349 (16.9) | 496 (29.6) |
| 40-49 | 1,147 (37.4) | 696 (33.6) | 432 (25.7) |
| 50-59 | 1,115 (36.4) | 1,025 (49.5) | 750 (44.7) |
| Sex | |||
| Male | 2,297 (75.1) | 1,542 (77.7) | 1,186 (70.8) |
| Female | 762 (24.9) | 443 (22.3) | 490 (29.2) |
| Off duty, days/month | |||
| 0 | 282 (9.4) | 139 (6.8) | 93 (5.6) |
| 1-4 | 1,293 (43.3) | 824 (40.1) | 478 (28.8) |
| 5-7 | 941 (31.5) | 686 (33.4) | 613 (37.0) |
| ≥8 | 473 (15.8) | 405 (19.7) | 473 (28.5) |
| On-call, days/month | |||
| 0 | 1,281 (42.3) | 890 (43.1) | 812 (48.7) |
| 1-4 | 660 (21.8) | 457 (22.1) | 333 (20.0) |
| 5-7 | 374 (12.3) | 239 (11.6) | 182 (10.9) |
| ≥8 | 716 (23.6) | 478 (23.2) | 341 (20.4) |
| Night shift work, days/month | |||
| 0 | 1,126 (37.0) | 793 (38.6) | 643 (38.4) |
| 1 | 302 (9.9) | 230 (11.2) | 162 (9.7) |
| 2-3 | 682 (22.4) | 437 (21.3) | 381 (22.8) |
| 4-5 | 561 (18.4) | 368 (17.9) | 346 (20.7) |
| ≥6 | 371 (12.2) | 224 (10.9) | 142 (8.5) |
| Sleeping, hours/day | |||
| <5 | 295 (9.7) | 232 (11.2) | 167 (10.0) |
| 5-6 | 1,081 (35.6) | 794 (38.4) | 555 (33.2) |
| 6-7 | 1,347 (44.4) | 847 (41.0) | 770 (46.0) |
| ≥7 | 310 (10.2) | 193 (9.3) | 182 (10.9) |
