Table 5.

Comparison of sleep quality between the two groups before and after intervention (x̅ ± s)

Groups	Time point	Subjective sleep quality	Sleep latency	Sleep persistence	Habitual sleep duration	Sleep disturbance	Sleep medication use	Daytime dysfunction	Total score of PSQI
Combined group (n=49)	Before intervention	2.03±0.62	2.29±0.74	2.25±0.65	2.49±0.76	2.54±0.76	2.49±0.73	2.15±0.62	15.11±2.11
	After intervention	1.38±0.39	1.36±0.39	1.36±0.35	1.21±0.32	1.21±0.31	1.17±0.41	1.51±0.27	8.93±1.96
t a		6.212	7.783	8.439	10.866	11.343	11.036	6.625	15.021
P a		<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Regular group (n=47)	Before intervention	2.15±0.73	2.16±0.57	2.09±0.65	2.2±0.61	2.41±0.54	2.35±0.67	2.25±0.69	14.75±2.19
	After intervention	1.67±0.43	1.74±0.53	1.65±0.65	1.93±0.45	1.83±0.42	1.87±0.6	1.81±0.53	12.07±1.78
t a		3.884	3.699	3.282	2.442	5.812	3.659	3.467	6.51
P a		<0.001	<0.001	0.001	0.017	<0.001	<0.001	0.001	<0.001
t b		0.869	0.961	1.206	2.057	0.962	0.978	0.748	0.82
P b		0.387	0.339	0.231	0.043	0.338	0.331	0.457	0.414
t c		3.464	4.013	2.737	9.064	8.253	6.698	3.516	8.206
P c		0.001	<0.001	0.007	<0.001	<0.001	<0.001	0.001	<0.001

Note: t _a and P _a indicated intra-group comparison; t _b and P _b indicated comparison before intervention; t _c and P _c indicated comparison after intervention.