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Table 4 Effects of copayment waiver policy implementation according to disease severity among National Health Insurance beneficiaries

From: An evaluation on the effect of the copayment waiver policy for Korean hospitalized children under the age of six

Variable Inpatient days per case Hospital expenditure per case
Total Industrial worker Self-employed Total Industrial worker Self-employed
Intercept 1.296a 1.254a 1.339a 11.724a 11.696a 11.769a
Gender −0.004a −0.002 −0.007a 0.051a 0.053a 0.046a
Age −0.018a −0.020a −0.017a 0.114a 0.118a 0.104a
Type of Medical Institute       
Tertiary hospital and General hospital 0.189a 0.188a 0.193a 1.078a 1.084a 1.066a
Hospital 0.075a 0.066a 0.090a 0.310a 0.288a 0.351a
Clinic - - - - - -
Etc. (Dental hospital, Health center, Oriental medical clinic) −0.473a −0.469a −0.481a −0.184a −0.281a −0.027
Fatal disease 0.370a 0.373a 0.365a 0.331a 0.329a 0.332a
Premium level       
Lower 0.114a 0.147a 0.111a 0.088a 0.102a 0.092a
Lower middle 0.109a 0.135a 0.088a 0.080a 0.096a 0.066a
Middle 0.078a 0.098a 0.066a 0.055a 0.067a 0.046a
High middle 0.040a 0.063a 0.030a 0.022a 0.033a 0.016a
High - - - - - -
Time −0.032a −0.015a −0.037a −0.163a −0.167a −0.148a
Fatal disease*time 0.093a 0.093a 0.092a 0.386a 0.393a 0.370a
Premium level*time       
Lower*time −0.036a −0.049a −0.043a −0.044a −0.023a −0.121a
Lower middle*time −0.013a −0.029a −0.003 −0.028a −0.035a −0.021a
Middle*time −0.014a −0.029a −0.003 −0.031a −0.041a −0.014
High middle*time 0.001 −0.013a 0.009 0.000 −0.006 0.013
High*time - - - - - -
R2 0.099 0.102 0.095 0.362 0.373 0.341
  1. aP-value < 0.05.