Income-related inequality and decomposition of edentulism among aged people in China

Table 3 Decomposition of Inequality in lack of functional dentition by income among the elderly in China in 2015 (N = 3463)

Variables	Elasticity	Concentration Indices	Contribution	%
Demographic variables				11.61
Gender
Male	Reference
Female	0.0615	− 0.0057	− 0.0003	0.84
Area
Urban	Reference
Rural	0.0192	− 0.0925	− 0.0018	4.31
Educational attainment level				6.46
Low	Reference
Medium	− 0.0005	0.3944	− 0.0002	0.46
High	− 0.0036	0.6968	− 0.0025	6.00
Income^#	− 0.4664	0.0664	− 0.0310	75.02
Knowledge, attitude and practices				15.52
Smoking				1.96
Yes	Reference
Never	− 0.0471	0.0212	− 0.0010	2.42
Quit smoking	0.0023	0.0827	0.0002	− 0.46
Dental service utilization in the past 12 months
No	Reference
Yes	− 0.0095	0.2017	− 0.0019	4.62
Attitude
Negative	Reference
Positive	− 0.0725	0.0254	− 0.0018	4.46
Knowledge
Low	Reference
High	− 0.0371	0.0508	− 0.0019	4.56
Medical insurance
No	Reference
Yes	0.0505	0.0007	< 0.0001	− 0.08
Perceived general health				− 6.16
Very poor/poor	Reference
Fair	0.0250	0.0040	0.0001	− 0.24
Good/very good	0.0266	0.0919	0.0024	− 5.92
Residual			− 0.0017	4.01

^#Natural log of annul household income per capita was calculated in the regression
Primary categories of contributing facotrs are in bold and aggregated contribution of each primary category is in bold

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