Lifetime Distribution of Medical Cost in Korea

Abstract

With the recognition that health care cost is highly correlated with age, this study aims at estimating the magnitude and distribution of lifetime medical costs. We employed a period life table model using data on single year’s medical expenditures from the Korea National Health Insurance Corporation, population data and a life table from Statistics Korea. To estimate lifetime medical costs for males and females, 100,000 hypothetical cohorts for each sex whose mortality rates come from the life table were constructed and assigned to medical costs at different ages and sexes. This procedure permits us to estimate lifetime medical costs at each age and for each sex. The method used here is to conceptually convert cross-sectional costs data into a longitudinal pattern of costs, generating profiles of medical costs from birth to death. The average member of the birth cohorts will spend KRW 74,150,000 (US$ 98,883 PPP) for men and KRW 87,868,000 (US$ 117,177 PPP) for women in 2007 over the course of his or her life. Total lifetime medical costs are 19 percent higher for females than males mainly due to differences in life expectancy. For the average life table member, half of all lifetime costs occur after about age 65. We also estimate the distribution of lifetime medical costs by phases of the life course. For males(females), 12.7(9.2) percent of a cohort’s expenditures occur from birth to age 19; 8.4(10.0) percent accrue during ages 20~39; 30.2(28.4) percent are expended during ages 40~64; 42.7(44.0%) percent are realized during ages 65~84; 5.9(8.4) percent accrue over age 85. The findings of the study are similar to the patterns of medical costs of other countries’ experiences provided by other literatures-high during infancy, low during childhood and young adulthood, then rising during middle-age and rapidly growing during the senior years.