Table 5.

Factors associated with OHRQoL.

Variable	B	Std. error	Beta (standardized)	t	P	95%CI for B
Age
20–30
30–40	0.242	1.844	0.015	0.131	0.896	−3.390–3.873
40–50	−0.277	2.144	−0.013	−0.129	0.897	−4.500–3.945
50–60	0.571	2.070	0.030	0.276	0.783	3.506–4.648
60–70	−1.076	2.382	−0.045	−0.452	0.652	−5.768–3.616
Gender
Male
Female	0.102	0.852	0.006	0.120	0.904	−1.575–1.780
Occupation
State-owned units	0.418	0.599	0.057	0.698	0.486	−0.762–1.599
Private units	−0.100	0.974	−0.006	−0.103	0.918	−2.018–1.818
Freelance work	0.102	1.435	0.006	0.071	0.943	−2.725–2.929
Retired
Education level
Elementary	−0.035	1.675	−0.002	−0.021	0.983	−3.334–3.263
Middle school	1.203	1.898	0.063	0.634	0.527	−2.536–4.941
Bachelor or above
Marital status
Married
Single	0.877	1.318	0.043	0.665	0.506	−1.719–3.473
Divorced	2.576	1.772	0.081	1.454	0.147	−0.914–6.066
Smoking	1.129	1.311	0.048	0.861	0.390	−1.454–3.712
Drinking	−2.584	1.034	−0.136	−2.498	0.013*	−4.620–(−0.547)
Socio-economic status
Very low	0.385	0.588	0.050	0.654	0.514	−0.774–1.544
Low	−1.084	1.171	−0.065	−0.925	0.356	−3.391–1.224
Middle	1.214	1.072	0.072	1.132	0.259	−0.899–3.326
High
Frequency of going to the dental clinics
Regular check	0.946	0.688	0.093	1.376	0.170	−0.408–2.301
Seldom	−0.462	1.322	−0.020	−0.349	0.727	−3.066–2.142
When necessary
Never	−3.675	1.616	−0.142	−2.275	0.024*	−6.857–(−0.493)
Voluntary service	−0.933	0.924	−0.060	−1.010	0.314	−2.753–0.887
Vaccination	0.004	1.106	0.000	0.004	0.997	−2.174–2.183
TMD symptoms
No symptoms of TMD
Symptoms of TMD without pain	2.797	1.051	0.142	2.660	0.008*	0.726–4.868
Symptoms of TMD with pain	12.079	1.732	0.408	6.976	<0.001*	8.669–15.490
Tooth loss	2.546	0.918	0.154	2.773	0.006*	0.738–4.355
Sleep disorder	2.598	0.881	0.169	2.949	0.003*	0.863–4.333
Tinnitus	1.261	0.985	0.078	1.279	0.202	−0.680–3.201
Relatively close contacts	0.168	0.832	0.011	0.202	0.840	−1.470–1.806

^*, P < 0.05 was considered significant.