Table 4.

Decomposition Analysis of Socioeconomic Inequality in Dental Care Utilization

	Marginal effect	Elasticity	RCIx	Contribution to RCI
				Absolute	%
Age, years	0.007**	0.549	0.011	0.006	2.4
Sex
Male (reference)
Female	0.269**	0.044	−0.143	−0.006	−2. 6
Education
Illiterate (reference)
Primary and secondary school	−0.292**	−0.132	−0.222	0.029	12.1
University graduate	−0.150*	−0.161	0.144	−0.023	−9.6
Total					2.5
Household size	−0.043*	−0.279	0.005	−0.001	−0.6
Employment
Unemployed (reference)
Self-employed	0.275**	0.233	−0.061	−0.014	−5.8
Employed	0.339**	0.168	0.017	0.003	1.2
Retired	0.372**	0.088	0.104	0.009	3.8
Total					−0.9
Self-rated oral health
Poor (reference)
Good	0.233**	0.149	0.112	0.017	6.9
Oral health important?
No (reference)
Yes	0.697**	0.796	0.006	0.005	2.1
Dental health insurance
No (reference)
Yes	0.1095*	0.062	0.099	0.006	2.5
Regular brushing
No (reference)
Yes	0.010*	0.129	0.061	0.008	3.2
Monthly household income (IRR)
<10 million (reference)
10–20 million	0.035*	0.021	−0.042	−0.001	−0.4
20–40 million	0.85**	0.494	0.029	0.014	5.8
>40 million	0.95**	0.298	0.126	0.038	15.5
Total					20.9
Sum				0.089	36.5
Residual				0.154	64.5
RCI				0.243	100

Notes: *p>0.05; **p<0.05.