• Korean Journal of Social Welfare Studies
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• v.43 no.2
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• pp.319-344
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• 2012

This study decomposed Concentration Index(CI) and Hiwv Index(HI) of medical care utilization by subgroups: sex, age group, and region. CI and HI were decomposed into "the between group" component, "within group" component, and a residual. The results of analysis are summarized as follows; First, there was no influence of sex on the equity of medical care utilization measured by the numbers of visiting clinic. However, "within group" component of female explained .0441 among HI, .1035. This means that poor women's underutilization of medical care is the important factor in determining its degree of equity. Second, age groups had a decisive effect on the equity of medical care utilization measured by the numbers of visiting clinic. they explained -.0085 among HI, -.0170. Third, internal equality within elderly group was the most important factor in determining HI measured by the medical care cost. Finally, "within group" component of urban area explained .0535 amomg HI, ,1035 measured by medical care cost. This indicated that the urban poor's underutilization of medical care was very important factor in explaining its degree of equity. There was the poor's underutilization of medical care within the groups as female, the elderly, and urban areas. This significantly explained the equity of medical care costs.