Hours of work and sleep recorded among 38 702 study months
| Characteristics | Mean (standard deviation) in hours |
| Weekly work hours | 60.0 (16.1) |
| Hours engaged in patient care | 44.2 (17.9) |
| Additional weekly work hours related to programme | 5.2 (5.6) |
| Additional weekly hours moonlighting | 0.60 (2.6) |
| Shifts of extended duration per month | 1.6 (2.6) |
| Nightly sleep duration | 6.9 (1.0) |
| Sleep duration on shifts of extended duration | 2.5 (1.8) |
| Proportion (%) of extended shifts without sleep | 14% (n=2068/14 319) |
| Days off per month | 6.1 (2.2) |