Table 1.

Participant characteristics (n = 94). Values are mean (SD), number (proportion) or median (IQR [range]).

Age, y	52 (16.9)
Female sex	56 (59.6%)
ASA physical status
1	33 (35.1%)
2	61 (64.9%)
Surgical risk stratification
Minor	49 (52.1%)
Moderate	43 (45.7%)
Major	2 (2.1%)
Anaesthetic induction agent
Propofol	92 (97.8%)
Sevoflurane	1 (1.1%)
Thiopentone	1 (1.1%)
Anaesthetic maintenance agent
Propofol	85 (90.4%)
Sevoflurane	7 (7.4%)
Propofol+sevoflurane	2 (2.1%)
Duration of general anaesthesia
30 min–1 h	12 (12.8%)
1–2 h	40 (42.5%)
2–4 h	27 (28.7%)
≥ 4 h	15 (16.0%)
Sleep parameter characteristics
Number of workdays per week
0 workdays	26 (27.7%)
1–3 workdays	27 (28.7%)
4–6 workdays	41 (43.6%)
Shift work in previous 3 months	6 (6.4%)
Sleep variables, workdays
Sleep onset time	23.15 (23.00–00.00 [20.45–02.15])
Sleep latency, min	15 (10–15 [0–120])
Time of awakening	07.00 (06.11–07.45 [04.45–10.00])
Sleep inertia, min	15 (5–30 [0–165])
Use of alarm clock	45 (47.9%)
Total duration of sleep, h and min	7 h 45 min (1 h 13 min)
Patients taking a regular nap	15 (16.0%)
Total nap time, min	45 (30–75 [15–180])
Total time spent outside in daylight, min	180 (88–300 [0–650])
Sleep variables, work‐free days
Sleep onset time	23.45 (23.15–00.45 [21.15–02.30])
Sleep latency, min	15 (15–15 [0–120])
Time of awakening	08.00 (07.00–08.30 [05.00–11.30])
Sleep inertia, min	30 (15–49 [0–150])
Use of alarm clock	10 (10.6%)
Total duration of sleep, h and min	8 h (2 h 4 min)
Patients taking a regular nap	20 (21.3%)
Total nap time, min	60 (34–90 [15–240])
Total time spent outside in daylight, min	240 (150–350 [10–720])
Chronotype a , hh.mm	03.35 (55 min)

^a midpoint sleep on work‐free days corrected for sleep deficit on workdays.