Table 1.

Participant characteristics (n = 1241)

Age, mean ± SD, y	26.0 ± 2.9
Male Sex, n (%)	812 (65.4%)
Hospital type
University hospital, n (%)	495 (39.9%)
Other teaching hospital, n (%)	746 (60.1%)
Mean number of work hours per week, mean ± SD	79.4 ± 15.0
on weekdays, mean ± SD	12.2 ± 2.3
on weekends, mean ± SD	4.3 ± 3.2
80 or more hours of work per week, n (%)	554 (44.6%)
100 or more hours of work per week, n (%)	97 (7.8%)
Mean number of hours for sleep per day, mean ± SD	5.8 ± 0.9
Less than 6 h for sleep per day, n (%)	409 (33.0%)
Mean duration of disposable time per day, mean ± SD, hours/day	2.8 ± 1.6
Less than 2 h of free time, n (%)	244 (19.7%)
Number of night shifts per month, n (%)	3.6 ± 2.1
Working schedule after night shifts (n = 1065)
No change, n (%)	726 (68.2%)
Shorter working day, n (%)	291 (27.3%)
Rest day, n (%)	48 (4.5%)
Mean number of days off work per month, mean ± SD	4.7 ± 3.9
Number of calls during overtime duty per month, mean ± SD	3.0 ± 6.1