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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%