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

Table 5 Income difference in recurring high medical expenditure

			Unit: USD
Variables	Estimate^§	Std. Error	p-value
≥ at twice the average medical expense (n = 412)
Year (reference: 2008)
2009	622	52.2	0.2759
2010	1,041	87.7	0.1513
2011	1,123	92.4	0.1174
Case (reference: non-occurrence household)
Occurrence household	−2,275	111.5	0.0153
Interaction term (year x Case)
2009	−2,698	124.6	0.0269
2010	−1,143	77.4	0.1695
2011	−911	51.3	0.3295
≥ at three times the average medical expense (n = 200)
Year (reference: 2008)
2009	2,273	136.4	0.0758
2010	1,775	138.6	0.1715
2011	1,951	117.6	0.0772
Case (reference: non-occurrence household)
Occurrence household	−3,128	173.5	0.0348
Interaction term (year x Case)
2009	−3,598	157.2	0.0151
2010	−3,198	159.8	0.0332
2011	−3,244	134.4	0.0104

§ Adjusted odds ratio from multiple regression analysis with all of the variables in Table 1

ISSN: 1472-6963