Table 1. Comparison of gender, age, culture degree, income between the two groups.

Factor		Control group (n = 66)	Depression group (n = 25)	OR95%CI	χ2 value	P value
Gender	male	47	11	0.3176 (0.1225–0.8235)	5.7453	0.0165
	female	19	14	3.1483 (1.2144–8.1622)	5.7453	0.0165
Age	≤44	6	0	0.1825 (0.0099–3.3617)	2.4064	0.1208
	44–60	32	11	0.8348 (0.3309–2.1065)	0.1447	0.7036
	≥60	28	14	1.7273 (0.6826–4.3707)	1.3299	0.2488
Culture degree	high	12	3	0.6136 (0.1577–2.3880)	0.4978	0.4805
	middle	39	12	0.6391 (0.2533–1.6123)	0.8954	0.3440
	low	15	10	2.2667 (0.8458–6.0741)	2.6851	0.1013
Occupation	Physical labor	16	4	0.6250 (0.1860–2.1005)	0.5779	0.4471
type	mental labor	16	4	0.6250 (0.1860–2.1005)	0.5779	0.4471
	Retirement and no-occupation	34	17	2.0000 (0.7588–5.2712)	1.9782	0.1596
Income	inferior	31	13	1.2231(0.4867–3.0740)	0.1817	0.6699
	middle	32	11	0.8348(0.3309–2.1065)	0.1447	0.7036
	high	3	1	0.8750(0.0867–8.8283)	0.0127	0.9103