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Table 1 Validity test and correlation test

From: Does the medical insurance system play a real role in reducing catastrophic economic burden in elderly patients with cardiovascular disease in China? Implication for accurately targeting vulnerable characteristics

Instrumental variable DWH test Over-identification test F test Redundancy test
Community participation rate chi2(1) =4.5588
(p = 0.0327 < 0.05) *
chi2(1) =1.6578
(p = 0.1979 > 0.05) *
F = 24.3034 > 10 Chi-sq.(1) = 0.0000*
Self-assessed health Chi-sq.(1) =0.3873
  1. DWH test, *p<0.05; Over-identification test, *p>0.05; Redundancy test, *p<0.05