Table 1. Characterization of the Swiss and the two Japanese datasets: For the Swiss and the both Japanese datasets the period of data collection, the number of subjects, the age of subjects (mean SD), the ward the subjects worked on, the time frame of the day and the night shift and the order of the measured shifts are shown.
| Dataset | Swiss data | Japanese data 1 | Japanese data 2 |
|---|---|---|---|
| Data collection | 6.2011–11.2011 | 10.2010–2.2011 | 11.2011–2.2012 |
| N | 17 | 10 | 12 |
| Age | 33.5 ± 10.1 | 30.8 ± 8.9 | 31.5 ± 8.7 |
| Ward | Orthopedic ward (n=8) Intensive care (n=6) Emergency department (n=2) Post anesthesia care unit (n=1) |
Cardiology ward | Orthopedic ward (n=7) Circulation and lung (n=3) Surgery (n=2) |
| Day shift | 7.00–16.00 | 08.00–16.30 | 08.30–17.00 |
| Night shift | 21.30–7.00 (n=8)/23.00–7.30 (n=6)/ 22.00–6.00 (n=2)/20.00–6.30 (n=1) |
00.00–8.30 | 00.30–09.00 |
| Order of the measured shifts | Randomly; only one shift per day | Day shift and later on the same day night shift | Day shift and later on the same day night shift |