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KMID : 1170320100160020079
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Korean Journal of Health Economics and Policy
2010 Volume.16 No. 2 p.79 ~ p.100
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A study of identifying factors affecting cost-effectiveness threshold calculation in Korea
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Kim Youn-Hee
Bae Eun-Young
Shin Sang-Jin
Park Sun-Young
Song Hyun-Jin
Park Joo-Yeon
Ahn Jeong-Hoon
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Abstract
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This study was performed to search for cost-effectiveness threshold in Korea. A survey questionnaire using EQ-5D to measure QALY improvements and WTP in hypothetical scenarios were developed. 100 citizens in Seoul were interviewed face-to-face with this questionnaire in 2009. Each person’s WTP was asked for five scenarios chosen from each health improvement level based on Korean EQ-5D tariff: 0~0.2, 0.2~0.4, 0.4~0.6, 0.6~0.8, 0.8~1.0. The questionnaire also included questions on demographics, disease status, and a visual analog scale (VAS) measure of each scenario presented. Consistency of each respondent was checked by matching ranks of five scenarios between WTPs and QALY improvements either by VAS or Korean EQ-5D tariff. The WTP for an additional QALY (calculated by VAS and three existing Korean EQ-5D tariffs) was around 10.5~36.4 million won on average for those (N=70) who passed consistency check and not under medical assistance program. The relationship between WTP and QALY improvements measured by VAS was monotonic (people more appreciate significant improvements) whereas the relationship between WTP and QALY improvements measured by Korean tariffs were highest in 0~0.2 level. The choice of method to calculate QALY improvement seems crucial in cost-effectiveness threshold study in Korea. However, we expect this study can contribute to resolve the frictions over the interpretation of CEA in Korea.
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KEYWORD
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Cost-effectiveness, Economic Evaluation, Incremental Cost Effectiveness Ratio(ICER), Willingness To Pay(WTP), QALY
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