| Variable | n* | Medical patients | Surgical patients | p Value |
| Time of day | 108 | |||
| Day shift (%) | 33 (65) | 35 (61) | 0.877 | |
| Night shift (%) | 18 (35) | 22 (39) | ||
| Day of week | 108 | |||
| Weekday (%) | 41 (80) | 44 (77) | 0.865 | |
| Weekend (%) | 10 (20) | 13 (23) | ||
| Medical patient on | 108 | |||
| Medical unit (%) | 39 (76) | – | ||
| Non-medical unit (%) | 12 (24) | – | 0.005 | |
| Surgical patient on | ||||
| Surgical unit (%) | – | 55 (96) | ||
| Non-surgical unit (%) | – | 2 (3.5) | ||
| Intensive-care unit transfer ⩽24 h (%) | 106 | 5 (9.8) | 8 (14) | 0.655 |
| Emergency department admission (%) | 108 | 34 (66.7) | 24 (42.1) | 0.018 |
*n, patients with data available for review.