Table 2.

Comparison of mental health among participants with different demographic characteristics, n (%)

Variable	Category		Generalized anxiety disorder-7	Patient health questionaire-9	Insomnia severity index
Sex	Male	343 (33.9)	4.59 ± 4.80	5.14 ± 5.15	6.14 ± 5.41
	Female	668 (66.1)	4.43 ± 4.93	5.33 ± 5.60	6.24 ± 5.41
	t value		0.491	-0.507	-0.273
Ethnicity	Han	996 (98.5)	4.48 ± 4.89	5.25 ± 5.44	6.20 ± 5.42
	Other	15 (1.5)	5.00 ± 4.28	6.40 ± 6.14	6.33 ± 5.19
	t value		0.680	0.146	0.926
Age (years)	18-25	354 (35.0)	4.32 ± 4.72	5.22 ± 5.45	6.28 ± 5.46
	26-50	563 (55.7)	4.79 ± 5.01	5.56 ± 5.49	6.17 ± 5.32
	> 50	94 (9.3)	3.28 ± 4.47	3.65 ± 5.00	6.12 ± 5.78
	F value		4.162a	5.005b	0.053
Education	High school or below	77 (7.6)	5.79 ± 5.33	6.70 ± 6.60	7.40 ± 6.35
	College degree	164 (16.2)	4.41 ± 4.82	5.45 ± 5.56	6.55 ± 5.92
	Bachelor degree	440 (43.5)	4.41 ± 4.85	5.15 ± 5.25	5.93 ± 5.17
	Master degree or above	330 (32.6)	4.31 ± 4.82	4.99 ± 5.33	6.11 ± 5.20
	F value		2.033	2.194	1.892
Only child	Yes	281 (27.8)	5.17 ± 4.98	5.85 ± 5.45	6.83 ± 5.47
	No	730 (72.2)	4.22 ± 4.82	5.04 ± 5.44	5.96 ± 5.37
	t value		2.772b	2.139a	2.295a

^a P < 0.05.

^b P < 0.01.