Improved Pittsburgh Sleep Quality Index scores on first postoperative night achieved by propofol anesthesia in patients undergoing ambulatory gynecologic surgery

Table 2 Comparison of Pittsburgh Sleep Quality Index scores between two groups with display of each component by Wilcoxon signed-rank test

	Propofol anesthesia (n = 31)	Sevoflurane anesthesia (n = 30)	P
Global PSQI score (before surgery)	4.9 ± 2.3	5.5 ± 3.2	0.38
Global PSQI score (after srugery)	3.3 ± 1.3	6.5 ± 2.8	< 0.001
	P < 0.001	P = 0.02
Component 1
Subjective sleep quality (before)	2.3 ± 0.7	1.3 ± 0.7
Subjective sleep quality (after)	1.7 ± 0.4	1.5 ± 0.8
	P < 0.001	P = 0.13
Component 2
Sleep latency (before)	0.5 ± 0.8	1.0 ± 1.1
Sleep latency (after)	0.2 ± 0.6	0.6 ± 0.9
	P = 0.005	P = 0.03
Component 3
Sleep duration (before)	0.6 ± 0.6	1.1 ± 1.0
Sleep duration (after)	0.2 ± 0.4	1.2 ± 1.0
	P = 0.001	P = 0.77
Component 4
Habitual sleep efficiency (before)	0.0 ± 0.2	0.4 ± 0.8
Habitual sleep efficiency (after)	0.0 ± 0.2	1.1 ± 1.2
	P = 1.00	P = 0.01
Component 5
Sleep disturbances (before)	1.0 ± 0.0	0.8 ± 0.4
Sleep disturbances (after)	1.0 ± 0.0	1.0 ± 0.3
	P = 1.00	P = 0.01
Component 6
Use of sleeping medication (before)	0.3 ± 0.8	0.1 ± 0.5
Use of sleeping medication (after)	0.0 ± 0.2	0.0 ± 0.0
	P = 0.06	P = 0.32
Component 7
Daytime dysfunction (before)	1.0 ± 0.0	0.8 ± 0.4
Daytime dysfunction (after)	1.0 ± 0.0	1.1 ± 0.5
	P = 1.00	P = 0.01

The data are expressed as the mean ± SD. PSQI: Pittsburgh Sleep Quality Index.