| Perceived adaptation |  | |||
---|---|---|---|---|---|
 | Good (n = 250) | Poor (n = 358) | P a | ||
 | Mean | (SD) | Mean | (SD) |  |
Fit to job content (%) | 80.3 | (13.0) | 59.4 | (19.6) | < 0.001 |
Eveningness (currently) | 3.7 | (1.0) | 3.2 | (1.1) | < 0.001 |
Social and family disruption | 16.1 | (6.4) | 20.0 | (5.6) | < 0.001 |
Chronic fatigue | 89.5 | (21.9) | 103.7 | (20.9) | < 0.001 |
Shift system advantages | 5.4 | (2.1) | 5.0 | (1.7) | 0.023 |
Shift work locus of control | 107.2 | (15.2) | 99.1 | (16.1) | < 0.001 |
Psychological wellbeing (GHQ-12) | 11.6 | (3.5) | 13.6 | (4.2) | < 0.001 |
Daytime sleepiness (ESS) | 6.7 | (2.8) | 7.1 | (2.9) | 0.033 |
Sleep disturbance | Â | Â | Â | Â | Â |
   Day shift 1 | 20.8 | (6.2) | 22.3 | (6.0) | 0.002 |
   Day shift 2 | 20.8 | (5.9) | 22.2 | (5.7) | 0.005 |
   Afternoon shift | 17.6 | (5.9) | 19.3 | (5.9) | 0.007 |
   Night shift 1 |  |  |  |  |  |
between afternoon shift and night shift 1 (night) | 17.8 | (6.2) | 19.5 | (6.1) | 0.004 |
Before night shift 1 (daytime) | 22.8 | (7.5) | 27.7 | (6.8) | < 0.001 |
   Night shift 2 |  |  |  |  |  |
between night shift 1 and night shift 2 (daytime) | 22.7 | (7.2) | 26.3 | (7.4) | < 0.001 |
after night shift 2 (daytime) | 22.0 | (6.3) | 24.9 | (6.7) | < 0.001 |
on the first day off (night) | 16.7 | (6.3) | 18.8 | (6.3) | 0.001 |
Napping during night shifts (hours) | Â | Â | Â | Â | Â |
   Night shift 1 | 1.5 | (0.9) | 1.3 | (0.9) | 0.001 |
   Night shift 2 | 1.8 | (1.5) | 1.5 | (1.3) | 0.001 |