Table 13.

Average score on 7 dimensions of PSQI table.

Project	The average score	The domestic norm	t	P
The quality of sleep	1.16 ± 0.41	0.65 ± 0.82	9.64	<0.001
Time to fall asleep	0.98 ± 0.67	0.52 ± 0.33	11.58	<0.001
Sleeping time	1.76 ± 0.81	0.61 ± 0.49	41.83	<0.001
Sleep efficiency	0.35 ± 0.72	0.18 ± 0.24	7.62	<0.001
Sleep disorder	1.26 ± 0.84	0.73 ± 0.38	9.47	<0.001
Hypnotic drugs	1.58 ± 0.74	0.86 ± 0.47	26.92	<0.001
Daytime dysfunction	1.26 ± 0.75	0.43 ± 0.52	5.46	<0.001
PSQI total score	7.84 ± 1.62	3.88 ± 2.52	32.83	<0.001