The Korea National Health and Nutrition Examination Survey (KNHANES) is a population-based cross-sectional survey designed to assess the health related behavior, health condition, and nutritional state of Koreans (
http://knhanes.cdc.go.kr/). It was conducted as a tri-annual survey for the first 3 cycles, implemented in 1998, 2001, and 2005. Beginning with the 4th cycle of 2007, it was converted to an annual survey. The 2011 data was recently opened to the public, and is free for all researchers who want to use it.
The KNHANES provides a rich source of data which are easy to access and can be quickly obtained. Its ethical problems are minimal and there are no adverse effects in conducting the study. Using the KNHANES saves time, money, and personnel that would otherwise be spent collecting data, and provides a larger and higher-quality database beyond the capacity of any one individual researcher. Further, because the study participants are representative of the Korean population, the results have external validity.
Therefore, this data is helpful to young investigators. In fact, the portion of submitted articles to the Korean Journal of Family Medicine (KJFM) using the KNHANES as the primary source of data is significant. Specifically, one article in 2007, three articles in 2008, four articles in 2009, three articles in 2010, five articles in 2011, and five articles in 2012 used the KNHANES data as their primary data source, totaling 21 articles (6.2%) among 338 original articles during the previous five years.
However, there are several points investigators should keep in mind when using the KNHANES data.
First, the KNHANES data are open to the public and there is no systematic process to control the research topic assignment. Many researchers might investigate the same topic simultaneously, especially popular topics like obesity and metabolic syndrome. Before deciding on the study topic, a thorough search of the database like Medline, EMBASE, and the abstracts of related conferences are needed. Once the topic is decided upon, the article should be submitted as soon as possible. Otherwise someone else may publish a similar study from the same dataset before you do.
Second, investigators must be familiar with the huge and complex data structure and study design of the KNHANES. Non-response and multi-stage probability sampling should be taken into account by using survey statistics to estimate the data of the whole Korean population. Despite this, lots of studies submitted to KJFM using the KNHANES do not apply sampling weight in their analysis. In such a case the estimated association might be biased and revision is required.
Third, the KNHANES is a secondary data source like the Korea Youth Risk Behavior Web-based Survey and the Community Health Survey, and has the same limitations that they have.
1) The main purpose of the KNHANES is to produce national statistics, not to answer a specific research question. Therefore, the particular information the investigator wants may not be collected. For these reasons, the dataset should be examined carefully to confirm that it includes the necessary data. There also exists a potential for errors or mistakes in the data, even with its rigorous documents control system. Missing data is also a problem in the KNHANES.
2)
Notes
References
- 1. Coyer SM, Gallo AM. Secondary analysis of data. J Pediatr Health Care 2005;19:60-63. PMID: 15662366.
- 2. Park HA. Rate of missing socioeconomic factors in the 4th KNHANES. Korean J Fam Med 2012;33:406-409. PMID: 23267427.
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Hee-kyoung Nam, Jungmi Park, Sung-il Cho
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Gyu Na Lee, Ha Yeh Rin Koo, Kyungdo Han, Young Bok Lee
Allergy, Asthma & Immunology Research.2022; 14(2): 273. CrossRef - Sleep disorders, mental health, and dry eye disease in South Korea
Youngju An, Hyojin Kim
Scientific Reports.2022;[Epub] CrossRef - Impairment of Quality of Life and Mental Health Status in Adult-Onset Atopic Dermatitis
Juhwan Yoo, Ha Yeh Rin Koo, Kyungdo Han, Young Bok Lee
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Yae Lim Lee, Heejin Jin, Jae-Young Lim, Sang Yoon Lee
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Soojin Park, Dal Nim Lee, Young Woo Jin, Eun Shil Cha, Won-Il Jang, Sunhoo Park, Songwon Seo
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ByungJ Jung, Donghyun Jee
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Kook Lee, Jin-Woo Kwon, Wan Jin Jahng, Young-Hoon Park, Donghyun Jee, Shree K. Kurup
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Seung-Ah Choe, Joohon Sung
Journal of Korean Medical Science.2020;[Epub] CrossRef - Factors Related to Oral Healthcare Service Utilization among Korean Adults Aged 25–79 Years
Han-Na Kim, Sang-Jun Han, Eun-Joo Jun, Jin-Bom Kim
International Journal of Environmental Research and Public Health.2020; 17(17): 6032. CrossRef - Relationship Between Obesity and Lumbar Spine Degeneration: A Cross-Sectional Study from the Fifth Korean National Health and Nutrition Examination Survey, 2010–2012
Sang Yoon Lee, Won Kim, Shi-Uk Lee, Kyoung Hyo Choi
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Seung Hoo Lee, Hyun Sik Gong, Sehun Kim, Jihyeung Kim, Goo Hyun Baek
Arthroscopy: The Journal of Arthroscopic & Related Surgery.2019; 35(5): 1379. CrossRef - The Association between Sleep Duration and Dizziness in Korean Women: The Korea National Health and Nutrition Examination Survey
Se-Hwan Hwang, Jun-Myung Kang, Jae-Hyun Seo, Kyung-do Han, Young-Hoon Joo
Journal of Korean Medical Science.2019;[Epub] CrossRef - Associations between Retinal Nerve Fiber Layer Defect and Systemic Indices According to the KNHNES 2010–2012
Suk Hoon Jung, Sooji Jeon, Chan Kee Park, Hae-Young Lopilly Park
Journal of the Korean Ophthalmological Society.2019; 60(11): 1089. CrossRef - Number of remaining teeth and its association with socioeconomic status in South Korean adults: Data from the Korean National Health and Nutrition Examination Survey 2012-2013
Yang Hyun Kim, Kyungdo Han, David Vu, Kyung-Hwan Cho, Sang Hwa Lee, Antonio Palazón-Bru
PLOS ONE.2018; 13(5): e0196594. CrossRef - Recent Trend and Associated Factors of Harmful Alcohol Use Based on Age and Gender in Korea
Seung-Ah Choe, Seunghyun Yoo, Jung JeKarl, Kwang Kee Kim
Journal of Korean Medical Science.2018;[Epub] CrossRef - Negative Association of Hepatitis B Virus With Hearing Impairment
SKM Azizul Islam, Jin Wook Chung, Young-Sil Lee, HoChan Cho, Seong-Su Moon
American Journal of Audiology.2018; 27(3): 324. CrossRef - Association between low bone mineral density and hearing impairment in postmenopausal women: the Korean National Health and Nutrition Examination Survey
Seong-Su Lee, Kyung-do Han, Young-Hoon Joo
BMJ Open.2018; 8(1): e018763. CrossRef - Epidemiological association of olfactory dysfunction with hearing loss and dysphonia in the Korean population
Jae Hong Park, Hyung Kwon Byeon, Ki Nam Park, Jae Wook Kim, Seung Won Lee, Kyung-do Han, Jae Won Chang, Won Shik Kim, Yoon Woo Koh, Myung Jin Ban
Medicine.2017; 96(47): e8890. CrossRef - Associations between Intraocular Pressure and Systemic Parameters according to the KNHNES 2008-2011
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Yeun Joo Shin, Ji Yong Song, Min Jeong Kim, Jeong In Choi, Kyung-Do Han, Hae Nam Lee
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Taiwanese Journal of Obstetrics and Gynecology.2017; 56(4): 482. CrossRef - The prevalence of hypertension in relation with the normal albuminuria range in type 2 diabetes mellitus within the South Korean population: The Korean National Health and Nutrition Examination Survey, 2011–2012
Koh-Eun Shin, Yong-Kyun Roh, Kyung-Hwan Cho, Kyung-Do Han, Yong-Gyu Park, Do-Hoon Kim, Yang-Hyun Kim
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Donghyun Jee, Nana Keum, Seungbum Kang, Jorge G. Arroyo
Acta Ophthalmologica.2017; 95(1): 41. CrossRef - Patient Awareness of Cataract and Age-related Macular Degeneration among the Korean Elderly: A Population-based Study
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Korean Journal of Ophthalmology.2017; 31(6): 557. CrossRef - Gender differences in the relationship between socioeconomic status and height loss among the elderly in South Korea
Yang-Hyun Kim, Kyung-Sik Ahn, Kyung-Hwan Cho, Chang Ho Kang, Sung Bum Cho, Kyungdo Han, Yong-Kyun Rho, Yong-Gyu Park
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Seong-Su Lee, Kyung-do Han, Young-Hoon Joo
BMJ Open.2017; 7(7): e013736. CrossRef - The Association of Vitamin D With Estimated Glomerular Filtration Rate and Albuminuria: 5th Korean National Health and Nutritional Examination Survey 2011–2012
Jong Park, So-Yeon Ryu, Mi-ah Han, Seong-Woo Choi
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Se-Hwan Hwang, Jun-Myung Kang, Jae-Hyun Seo, Kyung-do Han, Young-Hoon Joo, Yiqing Song
PLOS ONE.2016; 11(2): e0148813. CrossRef - Relationship between tinnitus and suicidal behaviour in Korean men and women: a cross‐sectional study
J.H. Seo, J.M. Kang, S.H. Hwang, K.D. Han, Y.H. Joo
Clinical Otolaryngology.2016; 41(3): 222. CrossRef - Serum 25-Hydroxyvitamin D Levels and Dry Eye Syndrome: Differential Effects of Vitamin D on Ocular Diseases
Donghyun Jee, Seungbum Kang, Changzheng Yuan, Eunyoung Cho, Jorge G. Arroyo, Andrew W Taylor
PLOS ONE.2016; 11(2): e0149294. CrossRef - Upper Normal Alanine Aminotransferase Range and Insulin Resistance in Korean Adolescents: Korean National Health and Nutrition Examination Survey, 2009–2010
Yoon Lee, Kyung-Do Han, Jennifer Jaeeun Jung, Kee-Hyoung Lee, Kyung-Hwan Cho, Yang-Hyun Kim
Digestive Diseases and Sciences.2016; 61(6): 1700. CrossRef - Oral health behaviors and bone mineral density in South Korea: the 2008–2010 Korean National Health and Nutrition Examination Survey
Hyun-Jin Kim, Yang-Hyun Kim, Kyung-Hwan Cho, Byoung-Duck Han, Seon-Mee Kim, Youn-Seon Choi, Do-Hoon Kim, Kyung- Do Han, Yong-Joo Lee, Chul-Min Kim
Journal of Bone and Mineral Metabolism.2016; 34(2): 225. CrossRef - Mapping health assessment questionnaire disability index (HAQ-DI) score, pain visual analog scale (VAS), and disease activity score in 28 joints (DAS28) onto the EuroQol-5D (EQ-5D) utility score with the KORean Observational study Network for Arthritis (K
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Rheumatology International.2016; 36(4): 505. CrossRef - Suicidal ideation among postmenopausal women on hormone replacement therapy: The Korean National Health and Nutrition Examination Survey (KNHANES V) from 2010 to 2012
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Yun Hwi Park, Seung-Ho Shin, Sung Wan Byun, Ju Yeon Kim, Pietro Cipresso
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Seoyon Yang, Won Kim, Kyoung Hyo Choi, You Gyung Yi
International Archives of Occupational and Environmental Health.2016; 89(8): 1321. CrossRef - Inverse relationship between sleep duration and myopia
Donghyun Jee, Ian G. Morgan, Eun chul Kim
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Donghyun Jee, Eun Chul Kim, Eunyoung Cho, Jorge G. Arroyo, Andrzej T Slominski
PLOS ONE.2016; 11(6): e0157501. CrossRef - The hemoglobin values of Korean adolescents show distinctive characteristics in comparison to those of Caucasians and African Americans
Jung Sub Lim, Ju‐Hee Seo, Dong Ho Kim, Jun Ah Lee
Pediatric Blood & Cancer.2015; 62(3): 409. CrossRef - Non-linear pattern of age-specific bone mineral density and related factors in women: data from the 5th Korea National Health and Nutrition Examination Survey
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Jun Ah Lee, Jin Soon Hwang, Il Tae Hwang, Dong Ho Kim, Ju-Hee Seo, Jung Sub Lim
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J. S. Lim, H. S. Lee, E. Y. Kim, K. H. Yi, J. S. Hwang
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Ho Sik Hwang, Seung Bum Lee, Donghyun Jee, Demetrios Vavvas
PLOS ONE.2015; 10(8): e0134338. CrossRef - Association of Hearing Loss and Tinnitus with Health-Related Quality of Life: The Korea National Health and Nutrition Examination Survey
Young-Hoon Joo, Kyung-do Han, Kyung Ho Park, Manuel S. Malmierca
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Donghyun Jee, Eun Chul Kim
Journal of Cataract & Refractive Surgery.2015; 41(8): 1705. CrossRef - Normal Range Albuminuria and Metabolic Syndrome in South Korea: The 2011–2012 Korean National Health and Nutrition Examination Survey
Si-Young Park, Yong-Kyu Park, Kyung-Hwan Cho, Hee-Jeong Choi, Jee-Hye Han, Kyung-Do Han, Byung-Duck Han, Yeo-Joon Yoon, Yang-Hyun Kim, Harald Mischak
PLOS ONE.2015; 10(5): e0125615. CrossRef - Scaling of adult regional body mass and body composition as a whole to height: Relevance to body shape and body mass index
John M. Schuna, Courtney M. Peterson, Diana M. Thomas, Moonseong Heo, Sangmo Hong, Woong Choi, Steven B. Heymsfield
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Ki-Mo Jang, Kyung-Hwan Cho, Soon-Hyuck Lee, Seung-Beom Han, Kyung-Do Han, Yang-Hyun Kim
Maturitas.2015; 82(4): 360. CrossRef - Relationship between Olfactory Dysfunction and Suicidal Ideation: The Korea National Health and Nutrition Examination Survey
Young-Hoon Joo, Se-Hwan Hwang, Kyung-do Han, Jae-Hyun Seo, Jun-Myung Kang
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Young-Hoon Joo, Kyung-Do Han, Seong-Su Lee
Obesity Facts.2015; 8(4): 252. CrossRef - Prevalence and Control of Hypertension and Albuminuria in South Korea: Focus on Obesity and Abdominal Obesity in the Korean National Health and Nutrition Examination Survey, 2011–2012
Su-Jung Yoon, Do-Hoon Kim, Ga-Eun Nam, Yeo-Joon Yoon, Kyung-Do Han, Dong-Wook Jung, Sang-Woon Park, Young-Eun Kim, Sung-Ho Lee, Sang-Su Lee, Yang-Hyun Kim, Shengxu Li
PLoS ONE.2014; 9(10): e111179. CrossRef - Prevalence and Risk Factors for Age-Related Macular Degeneration: Korean National Health and Nutrition Examination Survey 2008–2011
Tae Yoon La, Eunyoung Cho, Eun Chul Kim, Seungbum Kang, Donghyun Jee
Current Eye Research.2014; 39(12): 1232. CrossRef - Inverse Association between High Blood 25-Hydroxyvitamin D Levels and Diabetic Retinopathy in a Representative Korean Population
Donghyun Jee, Kyung do Han, Eun Chul Kim, Demetrios Vavvas
PLoS ONE.2014; 9(12): e115199. CrossRef - Prevalence of insulin resistance and cardiometabolic risk in Korean children and adolescents: A population-based study
Kyung Hee Yi, Jin Soon Hwang, Eun Young Kim, Sun Hee Lee, Dong Ho Kim, Jung Sub Lim
Diabetes Research and Clinical Practice.2014; 103(1): 106. CrossRef - Advantages, limitations, and opportunities in the use of national databases
Lynnette Leidy Sievert
Menopause.2014; 21(3): 209. CrossRef - Total mercury concentrations in the general Korean population, 2008–2011
Jae-Hong Park, Myung-Sil Hwang, Ahra Ko, Da-Hyun Jeong, Hui-Seung Kang, Hae-Jung Yoon, Jin-Hwan Hong
Regulatory Toxicology and Pharmacology.2014; 70(3): 681. CrossRef