Table 1.

Demographic and clinical characteristics of participants^a.

Variables	sDSDs (n=114)	HCs (n=93)	t /${\mathit{\chi }}^2$	p-value
Sex (M/F)	30 / 84	34 / 59	2.516	0.113b
Age (years)	22.85 (2.28)	22.22 (1.75)	2.264	0.072c
Education (years)	16.24 (2.01)	15.81 (1.71)	1.660	0.147c
PSQI	11.73 (2.77)	1.97 (2.16)	25.462	0.001c
HAMD-17	13.91 (5.00)	2.25 (1.53)	24.110	0.001c

^aContinuous variables presented as Mean (Standard Deviation).

^bThe p-values were obtained by Wilcoxon rank sum tests.

^cThe p-value was obtained by the chi-square test.