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Table 4 Income difference in occurring high medical expenditure

From: The effect of high medical expenses on household income in South Korea: a longitudinal study using propensity score matching

   Unit: USD
Variables Estimate§ Std. Error p-value
≥ at twice the average medical expense (n = 1,956)    
Year (reference: 2007)    
  2008 556 44.6 0.1818
  2009 47 58.6 0.9315
  2010 672 49.8 0.1482
  2011 791 55.7 0.1283
Case (reference: non-occurrence household)    
  Occurrence household −1,435 67.6 0.0230
Interaction term (year x Case)    
  2008 −1,353 51.5 0.0049
  2009 −888 67.5 0.1591
  2010 −770 57.3 0.1503
  2011 −434 64.0 0.4672
≥ at four times the average medical expense (n = 696)    
Year (reference: 2007)    
  2008 2,597 103.4 0.0073
  2009 2,605 130.7 0.0330
  2010 835 107.0 0.4029
  2011 1,212 113.6 0.2532
Case (reference: non-occurrence household)    
  Occurrence household −2,373 147.6 0.0453
Interaction term (year x Case)    
  2008 −2,233 119.3 0.0453
  2009 −2,862 150.6 0.0420
  2010 −1,790 123.1 0.1195
  2011 −1,342 130.5 0.2710
≥ at five times the average medical expense (n = 500)    
Year (reference: 2007)    
  2008 2,204 82.9 0.0046
  2009 2,340 103.4 0.0157
  2010 1,476 107.0 0.1403
  2011 1,098 120.8 0.3306
Case (reference: non-occurrence household)    
  Occurrence household −2,553 137.0 0.0464
Interaction term (year x Case)    
  2008 −2,147 95.7 0.0167
  2009 −2,385 119.0 0.0323
  2010 −2,749 123.0 0.0170
  2011 −1,840 138.7 0.1556
  1. § Adjusted odds ratio from multiple regression analysis with all of the variables in Table 1