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Table 4 Decomposition analysis of concentration index in CHE in 2013

From: Measurement and explanation of socioeconomic inequality in catastrophic health care expenditure: evidence from the rural areas of Shaanxi Province

  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