Table 7.

Factors of the occurrence of depression.

	Unitivariable analysis			Multivariable analysis
	P	OR	95% CI	P	OR	95% CI
Gender (male)	0.009*	0.505	0.303–0.841	0.049*	0.541	0.293–0.999
Age
20–30
30–40	<0.001*	8.873	2.945–26.735	0.009*	6.073	1.559–23.662
40–50	0.052	3.414	0.991–11.758
50–60	<0.001*	12.196	3.805–39.091	0.005*	7.857	1.848–33.415
60–70	0.043*	3.75	1.044–13.472	0.376	2.035	0.422–9.807
Marital status
Married
Single	0.011*	0.388	0.188–0.801	0.219	0.547	0.29–1.43
Divorced	0.006*	6.087	1.699–21.809	0.012*	6.155	1.503–25.208
Occupation
State-owned units
Private units	0.748	0.904	0.49–1.668
Freelance work	0.174	0.625	0.318–1.23
Retired	0.676	1.169	0.562–2.43
Education level
Elementary 0
Middle school	1.000	1.000	0.131–7.605
Bachelor or above	0.691	0.669	0.093–4.841
Socio-economic status
Very low
Low	0.575	0.78	0.327–1.861
Middle	0.895	1.061	0.444–2.532
High	0.818	1.106	0.468–2.616
Smoking	0.982	1.009	0.483–2.105
Drinking	0.222	0.685	0.374–1.256
Frequency of going to the dental clinics
Regular check
Seldom	0.245	0.545	0.196–1.515
When necessary	0.562	0.790	0.357–1.75
Never	0.127	0.421	0.139–1.277
Voluntary service	0.359	1.253	0.774–2.027
Vaccination	0.05*	0.526	0.276–1.001	0.126	0.543	0.249–1.188
TMD symptoms
No symptoms of TMD
Symptoms of TMD without pain	0.075	0.548	0.282–1.062
Symptoms of TMD with pain	0.068	2.441	0.935–6.372
Tooth loss	<0.001*	2.662	1.581–4.48	0.036*	1.958	1.046–3.664
Sleep disorder	0.002*	2.157	1.324–3.516	0.901	1.041	0.557–1.945
Tinnitus	<0.001*	3.499	2.088–5.864	0.027*	2.083	1.089–3.984
Relatively close contacts	<0.001*	3.42	2.076–5.634	<0.001*	3.182	1.754–5.77

^*, P < 0.05 was considered significant.