International Journal for Equity in Health

Table 2 Decomposition of concentration index of preventive health services utilization

From: Changes in inequality in utilization of preventive care services: evidence on China’s 2009 and 2015 health system reform

	2009 (n = 8574)				2015 (n = 9514)
	C_k	Elasticity	Absolute contribution	Percentage Contribution (%)	C_k	Elasticity	Absolute Contribution	Percentage Contribution(%)
Gender
Male	Ref.				Ref.
Female	−0.0051	0.0761	−0.0004	−0.17	0.0023	0.1397	0.0003	0.18
Age	0.0027	−0.2342*	− 0.0006	− 0.28	0.0155	0.6021*	0.0093	5.11
Marital status
Unmarried	Ref.				Ref.
Married	0.0122	0.1417*	0.0017	0.77	−0.0014	0.2067*	− 0.0003	− 0.16
Divorced / Widowed / Separated	− 0.1261	− 0.0017	0.0002	0.10	− 0.0359	0.0279	− 0.0010	− 0.55
Education
Primary school and below	Ref.				Ref.
High school	0.0179	0.1037*	0.0019	0.83	− 0.0802	− 0.0177	0.0014	0.78
Technical school	0.3310	0.0281*	0.0093	4.15	0.1770	−0.0010	− 0.0002	− 0.10
College and above	0.5085	0.0182*	0.0093	4.13	0.3737	0.0543*	.0203	11.12
Employment status
No	Ref.				Ref.
Yes	0.0224	−0.0469	−0.0011	− 0.47	0.0592	− 0.0828	− 0.0049	−2.69
Medical Insurance
No	Ref.				Ref.
Yes	0.0103	0.7096*	0.0073	3.26	0.0012	0.0471*	0.0001	0.03
Household income (RMB)	0.4863	−0.0066*	− 0.0032	−1.43	0.5059	0.0536*	0.0271	14.86
Residential location
Urban	Ref.				Ref.
Rural	−0.0379	− 1.5362*	0.0582	25.99	−0.0483	− 0.5121*	0.0247	13.55
Region
East	Ref.				Ref.
Central	−0.0393	−0.1955*	0.0077	3.43	−0.1192	−0.0463*	0.0055	3.02
West	−0.0732	−0.2723*	0.0199	8.90	−0.2911	0.0273	−0.0079	−4.35
Family size	−0.2207	−0.0116	0.0026	1.14	−0.0835	−0.0213	0.0018	0.97
Disease status
No	Ref.				Ref.
Yes	0.0760	0.0508	0.0039	1.72	0.0537	0.0236	.0013	0.69
Medical services
No	Ref.				Ref.
Yes	0.0533	0.0086	0.0005	0.20	0.2477	0.0443	.0110	6.01

* p < 0.05

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