Table 4.

Decomposing socioeconomic inequality of hypertension control in Iran

Categories	Coefficient	Elasticity	Concentration index (C)	Absolute contribution to C	Relative contribution to C per category of variable	Relative contribution to C per variable
Age group						-5.8
25–34	1
35–44	-0.115	-0.027	0.019	0.000	-0.6
45–54	-0.223	-0.168	0.087	-0.015	-17.7
55–64	-0.225	-0.273	0.065	-0.018	-21.4
65–74	-0.251	-0.250	-0.040	0.010	12.0
≥ 75	-186	-0.140	-0.129	0.018	21.9
Gender						1.0
Female	1
Male	0.005	0.008	0.105	0.001	1.0
Marital status
Single/divorced	1					-0.8
Married	0.005	0.005	-0.130	-0.001	-0.8
Area						29.7
Rural	1
Urban	0.018	0.052	0.473	0.024	29.7
Basic health insurance
No	1					0.2
Yes	0.003	0.011	0.015	0.000	0.2
Complementary insurance						21.2
No	1
Yes	0.037	0.048	0.365	0.017	21.2
Years of schooling						28.2
No schooling	1
1–6 years	0.069	0.083	0.068	0.006	6.8
7–12 years	0.070	0.058	0.269	0.016	18.9
> 12 years	0.061	0.024	0.085	0.002	2.5
Wealth status						25.9
Poorest	1
Poor	-0.009	-0.008	-0.293	0.002	2.8
Average	-0.001	-0.001	0.040	0.000	-0.1
Rich	0.015	0.012	0.350	0.004	4.9
Richest	0.043	0.029	0.523	0.015	18.2
C explained				0.0821	99.7
Residual				0.0002	0.3
C				0.0823