| Men |  | Women |  |
---|---|---|---|---|
 | (n = 3,025) | (%) | (n = 837) | (%) |
Age (years) | ||||
   24-29 | 38 | (1.3) | 51 | (6.1) |
   30-39 | 417 | (13.7) | 300 | (35.8) |
   40-49 | 876 | (29.0) | 270 | (32.3) |
   50-59 | 967 | (32.0) | 141 | (16.8) |
   60-69 | 464 | (15.3) | 55 | (6.6) |
   70 or more | 263 | (8.7) | 20 | (2.4) |
The number of days of off-duty per month | ||||
   None | 299 | (9.9) | 70 | (8.4) |
   1-4 days | 1203 | (39.8) | 279 | (33.3) |
   5-7 days | 986 | (32.6) | 222 | (26.5) |
   8 days or more | 537 | (17.7) | 266 | (31.8) |
The number of days of on-call per month | ||||
   None | 1338 | (44.2) | 476 | (56.9) |
   1-4 days | 669 | (22.1) | 149 | (17.8) |
   5-7 days | 379 | (12.5) | 59 | (7.0) |
   8 days or more | 639 | (21.1) | 153 | (18.3) |
Average sleeping hours for days not working overnight | ||||
   Less than 5 hours | 263 | (8.7) | 83 | (9.9) |
   5 to less than 6 hours | 977 | (32.3) | 290 | (34.6) |
   6 to less than 7 hours | 1390 | (46.0) | 366 | (43.7) |
   7 hours or more | 395 | (13.0) | 98 | (11.8) |
The number of days of overnight work per month | ||||
   None | 1261 | (41.7) | 480 | (57.3) |
   Once | 288 | (9.5) | 59 | (7.0) |
   2 to 3 times | 598 | (19.8) | 136 | (16.2) |
   4 to 5 times | 529 | (17.5) | 97 | (11.6) |
   6 times or more | 349 | (11.5) | 65 | (7.8) |
Score of the quick inventory depressive scale | ||||
   0-5 | 2054 | (67.9) | 550 | (65.7) |
   6-10 | 719 | (23.8) | 199 | (23.8) |
   11-15 | 199 | (6.5) | 66 | (7.9) |
   16-20 | 41 | (1.4) | 18 | (2.2) |
   21-27 | 12 | (0.4) | 4 | (0.5) |