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Table 5 Decomposition analysis of concentration index on respondents’ health services utilization before and after policy

From: The benefits of an integrated social medical insurance for health services utilization in rural China: evidence from the China health and retirement longitudinal study

Variables

Outpatient

Inpatient

Before policy

After policy

Before policy

After policy

Contribution to CI

%

Contribution to CI

%

Contribution to CI

%

Contribution to CI

%

CI

-0.0636

100

-0.0457

100

-0.0532

100

-0.1105

100

Needs variables

-0.0352

55.0997

-0.0286

62.4756

-0.0466

87.5468

-0.0510

46.0528

Economic status

-0.0138

21.8262

-0.0104

22.8630

0.0001

-0.2523

-0.0150

13.6533

Other variables

-0.0032

4.9824

0.0046

-9.8942

-0.002

3.9403

-0.0138

12.4353

Residuals

-0.0114

18.0917

-0.0113

24.5556

-0.0047

8.7652

-0.0307

27.8586

HI

-0.0284

-

-0.0171

-

-0.0066

-

-0.0595

-

  1. CI Concentration Index, % Pure percentage contributions of determinants to the socioeconomic inequality in inpatient health services utilization; Needs variables include sex, age, disability, pain and chronic diseases, other variables include education, living, smoking and drinking status, the detailed values of Contribution to CI and pure percentage for each variable are shown in the additional files 1 and 2, HI Horizontal inequity index.