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Study of Disability-Adjusted Life Expectancy(DALE) Using National Health Interview Survey in Korea  

Lee, Jung-Kyu (Department of Health Policy and Management, Seoul National University College of Medicine)
Do, Young-Kyung (Department of Health Policy and Management, Seoul National University College of Medicine)
Yoon, Seok-Jun (Department of Preventive Medicine, College of Medicine, Korea University)
Kim, Chang-Yup (Department of Public Health, Graduate School of Public Health, Seoul National University)
Kim, Yong-Ik (Department of Health Policy and Management, Seoul National University College of Medicine)
Shin, Young-Soo (Department of Health Policy and Management, Seoul National University College of Medicine)
Kwon, Young-Hoon (Department of Health Policy and Management, Seoul National University College of Medicine)
Publication Information
Journal of Preventive Medicine and Public Health / v.35, no.4, 2002 , pp. 331-339 More about this Journal
Abstract
Objectives : To measure DALE (Disability-Adjusted Life Expectancy) in Korea to find out how long Koreans live in a state of full heath. Methods : DALE was calculated using the life table of 1999 and the disability prevalence from the National Health Interview Survey (NHIS), which was conducted with a sample of 13,523 households in 1998. The disability prevalence was measured using the annual prevalence of the long-term limitation of activities, which were divided into classes 1, 2, 3, 4, 5 and 6 according to the severity of the limitation. The disability weights were measured for each 6 class by conducting a survey of 16 healthcare professionals. The severity-adjusted disability prevalence was calculated by multiplying the disability prevalence of each class by the disability weights respectively. Healthy life years lost due to disability was calculated by multiplying the life expectancy by the severity-adjusted disability prevalence. Finally DALE was measured as the life expectancy minus healthy life years lost due to disability. Results : DALE for 1999, which refers to the expectation of equivalent years of good health, were 72.5, 69.5 and 75.3 years, for total, for males and for females, respectively. The percentages for DALE out of the life expectancy were 95.8, 96.6 and 94.4% for total, for males and for females, respectively. Conclusions : DALE is a newly developed indicator, which could effectively show the healthy life expectancy of populations. A greater notice and use of DALE would be expected as life expectancies increase and the quality of life changes in Korea.
Keywords
Disability-adjusted life expectancy (DALE); Life expectancy; National Health Interview Survey (NHIS);
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