Table 3.

Comparison of PSQI scores in participants with different mental health conditions.

Variables	Negative psychological symptoms	Positive psychological symptoms	Z	p
PSQI score	6.41 ± 3.17	8.47 ± 3.40	-6.651	<0.001
Subjective sleep quality	1.57 ± 0.86	1.94 ± 0.83	-4.943	<0.001
Time of falling asleep	1.22 ± 0.93	1.70 ± 0.95	-5.519	<0.001
Sleeping time	1.39 ± 0.93	1.64 ± 0.97	-3.040	0.002
Sleep efficiency	0.41 ± 0.68	0.67 ± 0.75	-4.435	<0.001
Sleep disorders	0.89 ± 0.63	1.24 ± 0.78	-5.610	<0.001
Hypnotic drugs	0.07 ± 0.27	0.19 ± 0.48	-1.988	0.047
Daytime dysfunction	0.87 ± 0.92	1.14 ± 0.94	-3.520	0.001