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Table 7 Decomposition analysis of concentration index of CHE in 2008 and 2015

From: Increase of catastrophic health expenditure while it does not have socio-economic anymore; finding from a district on Tehran after recent extensive health sector reform

Variables Coefficient Mean Elasticity Concentration index (CI) Contribution to CI %
2008 2015 2008 2015 2008 2015 2008 2015 2008 2015
Economic status          83% 220.2%
 Quintile 1 (poorest) 1.402 −0.385 0.216 0.194 −0.115 −0.055 −0.785 0.823   
 Quintile 2 1.282 − 0.820 0.108 0.167 − 0.053 − 0.086 − 0.46 0.466   
 Quintile 3 1.026 −0.117 0.280 0.269 −0.109 − 0.021 − 0.071 −0.059   
 Quintile 4 0.689 0.052 0.152 0.157 −0.039 0.006 0.362 −0.461   
Lack of Insurance 0.836 0.472 0.263 0.848 −0.084 0.268 −0.095 0.031 6% −21.4%
Female household head 0.573 0.378 0.076 0.130 −0.016 0.033 −0.389 0.102 5% −8.5%
Having member ≥65 in Household 0.567 0.129 0.204 0.277 − 0.044 0.024 − 0.099 −0.059 3% 3.6%
Having member ≤5 in Household 0.374 0.261 0.179 0.117 −0.025 0.020 −0.068 0.032 1% −1.6%
Household size          8% −75.1%
 3–6 members −0.604 0.560 0.772 0.713 0.177 0.268 0.069 −0.080   
 ≥ 7 members −0.078 1.073 0.186 0.037 0.005 0.180 −0.357 0.284   
Having disabled member in household 0.335 −0.254 0.174 0.110 − 0.022 −0.019 −0.357 0.022 2% 1.1%
Dentistry service usage 1.589 0.329 0.154 0.372 −0.092 0.082 0.102 0.038 −7% −7.9%
Inpatient service usage 2.497 0.493 0.039 0.212 −0.036 0.070 −0.032 0.013 1% −2.3%
Outpatient service usage 1.789 0.003 0.782 32.40 −0.531 0.060 0.005 0.106 −2% −16.1%