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| Korea National Health and Nutrition Examination Survey | |
|---|---|
| Name | Korea National Health and Nutrition Examination Survey |
| Native name | 국민건강영양조사 |
| Acronym | KNHANES |
| Administered by | Korea Disease Control and Prevention Agency |
| Country | South Korea |
| Started | 1998 |
| Frequency | Annual |
| Sample size | ~10,000 per year |
Korea National Health and Nutrition Examination Survey is a nationwide, continuous population-based survey conducted in South Korea to assess health status, nutritional intake, and health-related behaviors of the civilian, non-institutionalized population. Managed by the Korea Disease Control and Prevention Agency, the survey generates data used by agencies such as the Ministry of Health and Welfare (South Korea), academic institutions like Seoul National University, and international organizations including the World Health Organization and the Organisation for Economic Co-operation and Development. Results inform public health initiatives, clinical guidelines, and epidemiological research across disciplines represented at institutions like Yonsei University and Korea University.
The survey integrates interviews, physical examinations, and laboratory tests to produce nationally representative estimates for indicators such as disease prevalence, nutritional status, and health behaviors. Comparable efforts include the National Health and Nutrition Examination Survey (United States), the Health Survey for England, and the Canadian Health Measures Survey. Data support surveillance of conditions like diabetes mellitus, hypertension, obesity, and hypercholesterolemia, and are widely cited in publications from journals affiliated with Korean Society of Epidemiology and global venues such as The Lancet, BMJ, and Nature Medicine.
Initial iterations began in 1998 under predecessor agencies of the Korea Disease Control and Prevention Agency, with major redesigns in 2007 to provide continuous annual data and expanded laboratory components. The evolution paralleled reforms in National Health Insurance (South Korea) policy and the rise of chronic disease burden studies at research centers linked to Asan Medical Center and Samsung Medical Center. International collaboration and methodological harmonization were influenced by agencies such as the Centers for Disease Control and Prevention and consortia convened at events like the World Congress of Epidemiology.
Methodological frameworks draw on standards used by European Health Interview Survey and the Global Burden of Disease collaborators, incorporating household interviews, nutrition questionnaires, standardized physical measurements, and biomarker assays processed in accredited laboratories akin to those at Seoul National University Hospital. Clinical protocols align with guidelines from specialty societies like the Korean Society of Cardiology and the Korean Diabetes Association. Quality assurance references include procedures similar to those promulgated by the International Organization for Standardization and the Clinical and Laboratory Standards Institute.
Analyses have documented rising prevalence of type 2 diabetes mellitus and metabolic syndrome corresponding with shifts in dietary patterns and physical activity among populations in metropolitan areas such as Seoul, Busan, and Incheon. Trends show increasing rates of obesity alongside reductions in some micronutrient deficiencies previously studied in cohorts linked to Ewha Womans University and Pusan National University. Surveillance outputs have underpinned policy responses to smoking trends monitored in relation to legislation like the National Health Promotion Act (South Korea) and tobacco control measures advocated by World Health Organization Framework Convention on Tobacco Control signatories.
Core data domains include sociodemographic variables collected per standards comparable to the Korean Statistical Information Service, dietary intake captured by 24-hour recall methods, laboratory measurements including fasting glucose, lipid panels, and hemoglobin, and physical measurements such as blood pressure and anthropometry. Specimens are analyzed for biomarkers including serum creatinine and vitamin D, facilitating linkage to registries like the National Cancer Center (South Korea) for cancer surveillance, and to cardiovascular cohorts associated with Korea University Medical Center.
The survey employs a complex, multistage probability sampling design with stratification by geographic units such as Si (South Korea), Gun (South Korea), and Gu (South Korea), and clustering at the household level to ensure representativeness. Sample weighting accounts for nonresponse and post-stratification against population estimates from the Korean Statistical Information Service. Quality control uses calibration studies, external proficiency testing modeled after programs run by the College of American Pathologists, and audit processes similar to those in national surveillance run by the Centers for Disease Control and Prevention.
Findings inform public health programs administered by the Ministry of Health and Welfare (South Korea), feed into revisions of national clinical guidelines from bodies like the Korean Association of Internal Medicine, and guide preventive services included in the National Health Insurance (South Korea) benefits. Academic outputs leverage KNHANES data in publications by researchers at Seoul National University College of Medicine, Yonsei University College of Medicine, and international collaborators from institutions such as Harvard T.H. Chan School of Public Health and Imperial College London, impacting policy debates and health technology assessments by agencies like the Korea Health Technology Assessment Service.
Category:Health surveys Category:Medical and health organizations based in South Korea Category:Public health in South Korea