Table 2.
Shift schedule characteristics. [SD=standard deviation]
| Persons | Daily responses for fatigue | Daily responses for sleep quality | Shift duration (hours) | Shift start time (hours) | Shift end time (hours) | |
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|
|
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|---|---|---|---|---|---|---|
| % (N) | % (N) | % (N) | Mean (SD) | Mean (SD) | Mean (SD) | |
| Type of shift a | ||||||
| Morning | 22 (48) | 2 (109) | 2 (100) | 07:58 (01:05) | 08:21 (01:28) | 16:20 (01:44) |
| Day | 82 (183) | 14 (877) | 14 (865) | 07:37 (00:59) | 12:00 (00:35) | 19:37 (00:55) |
| Evening | 63 (140) | 6 (356) | 6 (369) | 07:04 (01:45) | 15:23 (01:15) | 22:27 (01:35) |
| Night | 96 (215) | 25 (1572) | 27 (1656) | 08:02 (00:51) | 19:13 (01:31) | 03:16 (01:10) |
| Day off following workday | 99 (220) | 21 (1280) | 20 (1265) | |||
| ≥2 days off following a working day | 98 (219) | 32 (1979) | 31 (1940) | |||
| Successive night shifts | ||||||
| 1 | 96 (214) | 56 (877) | 58 (954) | |||
| 2 | 78 (173) | 29 (453) | 27 (448) | |||
| 3 | 37 (83) | 9 (144) | 10 (159) | |||
| ≥4 | 19 (43) | 6 (97) | 6 (94) | |||
| Time between shfits (hours rest) | ||||||
| <11 (quick return) | 43 (95) | 4 (114) | 4 (108) | |||
| 11–16 | 84 (188) | 24 (688) | 23 (696) | |||
| ≥16 | 98 (219) | 72 (2050) | 73 (2181) | |||
| Rotation direction | ||||||
| Backward | 83 (185) | 19 (477) | 21 (567) | |||
| Stable | 96 (214) | 60 (1524) | 60 (1605) | |||
| Forward | 84 (187) | 22 (550) | 19 (512) |
a
Morning shift (starts after 06:00 and before 11:00 and mostly at 07:00 hours); day shift (starts after 11:00 and before 14:00; evening shift (starts after 14:00 and ends before 01:00 hours); night shift (starts after 14:00 and ends after 01:00 hours).