Table 4.

Decomposition analysis of concentration index in CHE in 2013

	Elasticity	Concentration index (C)	Contribution to C	Contribution to C (%)
Having elderly members	−0.062	−0.116	0.007	6.17
Household size				44.11
1-2 family members	−0.338	−0.186	0.063
3-4 family members	−0.069	0.160	−0.011
Male household head	−0.051	0.008	0.000	−0.35
Household head’s educational achievement				16.93
Illiteracy	−0.064	−0.256	0.016
Elementary	−0.075	−0.074	0.006
Middle school	−0.020	0.107	−0.002
Having chronic disease members	−0.118	0.021	−0.003	−2.14
Inpatient service usage	−0.142	0.136	−0.019	−16.49
Outpatient service usage	−0.022	0.085	−0.002	−1.61
Absence of social health insurance	−0.003	0.169	−0.001	−0.49
Absence of commercial health insurance	−0.188	−0.031	0.006	4.96
Economic status				48.79
Quintile 1 (poorest)	−0.082	−0.638	0.053
Quintile 2 (poorer)	−0.041	−0.263	0.011
Quintile 3 (middle)	−0.037	0.033	−0.001
Quintile 4 (richer)	−0.018	0.266	−0.005
C of Ln odds CHE	0.118
Mean of Ln odds CHE	−1.968
Observations	13085