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Original Article
Comparison of estimates and time series stability of Korea Community Health Survey and Korea National Health and Nutrition Examination Survey
Ji Son Ki, Ho Kim
Epidemiol Health. 2019;41:e2019012.   Published online April 7, 2019
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AbstractAbstract AbstractSummary PDFSupplementary Material
In South Korea, there are two nationwide health surveys conducted by the Korea Centers for Disease Control and Prevention: the Korea Community Health Survey (KCHS) and Korea National Health and Nutrition Examination Survey (KNHANES). The two surveys are directly comparable, as they have the same target population with some common items, and because both surveys are used in various analyses, identifying the similarities and disparities between the two surveys would promote their appropriate use. Therefore, this study aimed to compare the estimates of six variables in KCHS and eight variables in KNHANES over a six-year period and compare time series stability of region-specific and sex- and age-specific subgroup estimates.
Data from adults aged 19 years or older in the 2010-2015 KCHS and KNHANES were examined to analyze the differences of estimates and 95% confidence interval for self-rated health, current smoking rate, monthly drinking rate, hypertension diagnosis rate, diabetes diagnosis rate, obesity prevalence, hypertension prevalence, and diabetes prevalence. The variables were then clustered into subgroups by city as well as sex and age to assess the time series stability of the estimates based on mean square error.
With the exception of self-rated health, the estimates taken based on questionnaires, namely current smoking rate, monthly drinking rate, hypertension diagnosis rate, and diabetes diagnosis rate, only differed by less than 1.0%p for both KCHS and KNHANES. However, for KNHANES, estimates taken from physical examination data, namely obesity prevalence, hypertension prevalence, and diabetes prevalence, differed by 1.9-8.4%p, which was greater than the gap in the estimates taken from questionnaires. KCHS had a greater time series stability for subgroup estimates than KNHANES.
When using the data from KCHS and KNHANES, the data should be selected and used based on the purpose of analysis and policy and in consideration of the various differences between the two data.
Korean summary
본 연구는 지역사회건강조사와 국민건강영양조사의 2010년부터 2015년까지 6년간의 자료로 각각 6개, 8개 변수의 추정치를 비교하였다. 설문변수 간의 추정치 차이보다 설문변수와 검진변수간의 추정치의 더 차이가 컸고 하위그룹별 시계열 변동은 지역사회건강조사가 더 안정적이었다.


Citations to this article as recorded by  
  • Variability Test of Estimates of Korea Community Health Survey Data in Gyeongsangnam-do (2008-2018)
    Youngjun Seon, Baekgeun Jeong, Boyeong Jin, Zunghun Lim, Changjin Cho, Youngeun Son, Dong Wook Kim
    Journal of Health Informatics and Statistics.2023; 48(3): 281.     CrossRef
  • Measurement of physical activity and sedentary behavior in national health surveys, South America
    Danilo R. Silva, Luciana L. Barboza, Se-Sergio Baldew, Cecilia Anza-Ramirez, Robinson Ramírez-Vélez, Felipe B. Schuch, Thayse N. Gomes, Kabir P. Sadarangani, Antonio García-Hermoso, Ramfis Nieto-Martinez, Gerson Ferrari, J. Jaime Miranda, André O. Werneck
    Revista Panamericana de Salud Pública.2022; 46: 1.     CrossRef
  • Differences in accuracy of height, weight, and body mass index between self-reported and measured using the 2018 Korea Community Health Survey data
    Yoonsil Ko, Sunhye Choi, Jisoo Won, Yeon-Kyeng Lee, Dong-Hyun Kim, Seon Kui Lee
    Epidemiology and Health.2022; 44: e2022024.     CrossRef

Epidemiol Health : Epidemiology and Health