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Cohort Profile
Cohort profile: the Korean Youth Health Behavior Panel Survey (KYHPS)
Jun Hyun Hwang, Inho Park, Soon-Woo Park
Epidemiol Health. 2026;48:e2026017.   Published online April 22, 2026
DOI: https://doi.org/10.4178/epih.e2026017
  • 2,865 View
  • 78 Download
AbstractAbstract AbstractSummary PDF
Abstract
The identification of factors that predispose adolescents to adopt healthy lifestyles is essential because this developmental stage shapes long-term health trajectories. To address the lack of longitudinal data on adolescent health in Korea, the Korean Youth Health Behavior Panel Survey (KYHPS) was established in 2019. The KYHPS recruited 5,051 sixth-grade students from 260 elementary schools nationwide, excluding Jeju, and follows them annually for 10 years using a stratified multistage probability sampling design. Data were collected using tablet-assisted self-interviews, and the questionnaires were developed on the basis of the ecological model of health behaviors. The survey focused on 4 major domains—tobacco use, alcohol consumption, diet, and physical activity—along with psychosocial and contextual factors at the individual, family, peer, school, and community levels. Panel retention was 93.1% in Wave 2 and 82.0% in Wave 6. The KYHPS is the first national longitudinal survey specifically focused on adolescent health behaviors in Korea and provides a unique opportunity to examine health trajectories and their determinants across adolescence and into early adulthood, with important implications for prevention and policy.
Summary
Korean summary
청소년건강패널조사는 질병관리청이 2019년부터 전국 초등학교 6학년 5,051명을 10년간 추적하는 우리나라 최초의 청소년 건강행태 종단조사입니다. 본 조사는 흡연, 음주, 식생활, 신체활동 등 주요 건강행태와 이에 영향을 미치는 개인·가족·또래·학교·지역사회 요인을 반복적으로 측정하여 청소년기 건강행태의 변화과정과 결정요인을 규명할 수 있는 기반을 제공한다. 향후 청소년 건강정책 수립과 근거 기반 연구를 위한 핵심 자료원으로 활용될 것으로 기대된다.
Key Message
The Korean Youth Health Behavior Panel Survey (KYHPS) is the first national longitudinal study of adolescent health behaviors in Korea, conducted by the Korea Disease Control and Prevention Agency (KDCA). Since 2019, the survey has followed 5,051 sixth-grade students nationwide over a 10-year period. The KYHPS repeatedly assesses major health behaviors, including tobacco use, alcohol consumption, dietary behaviors, and physical activity, as well as individual, family, peer, school, and community factors that influence these behaviors. By providing longitudinal data on the development and determinants of adolescent health behaviors, the KYHPS serves as a valuable resource for future research and evidence-based adolescent health policy.
COVID-19: Original Article
Korea Seroprevalence Study of Monitoring of SARS-COV-2 Antibody Retention and Transmission (K-SEROSMART): findings from national representative sample
Jina Han, Hye Jin Baek, Eunbi Noh, Kyuhyun Yoon, Jung Ae Kim, Sukhyun Ryu, Kay O Lee, No Yai Park, Eunok Jung, Sangil Kim, Hyukmin Lee, Yoo-Sung Hwang, Jaehun Jung, Hun Jae Lee, Sung-il Cho, Sangcheol Oh, Migyeong Kim, Chang-Mo Oh, Byengchul Yu, Young-Seoub Hong, Keonyeop Kim, Sun Jae Jung, Mi Ah Han, Moo-Sik Lee, Jung-Jeung Lee, Young Hwangbo, Hyeon Woo Yim, Yu-Mi Kim, Joongyub Lee, Weon-Young Lee, Jae-Hyun Park, Sungsoo Oh, Heui Sug Jo, Hyeongsu Kim, Gilwon Kang, Hae-Sung Nam, Ju-Hyung Lee, Gyung-Jae Oh, Min-Ho Shin, Soyeon Ryu, Tae-Yoon Hwang, Soon-Woo Park, Sang Kyu Kim, Roma Seol, Ki-Soo Park, Su Young Kim, Jun-wook Kwon, Sung Soon Kim, Byoungguk Kim, June-Woo Lee, Eun Young Jang, Ah-Ra Kim, Jeonghyun Nam, The Korea Community Health Survey Group, Soon Young Lee, Dong-Hyun Kim
Epidemiol Health. 2023;45:e2023075.   Published online August 17, 2023
DOI: https://doi.org/10.4178/epih.e2023075
  • 28,334 View
  • 270 Download
  • 13 Web of Science
  • 13 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
We estimated the population prevalence of antibodies to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including unreported infections, through a Korea Seroprevalence Study of Monitoring of SARS-CoV-2 Antibody Retention and Transmission (K-SEROSMART) in 258 communities throughout Korea.
METHODS
In August 2022, a survey was conducted among 10,000 household members aged 5 years and older, in households selected through two stage probability random sampling. During face-to-face household interviews, participants self-reported their health status, COVID-19 diagnosis and vaccination history, and general characteristics. Subsequently, participants visited a community health center or medical clinic for blood sampling. Blood samples were analyzed for the presence of antibodies to spike proteins (anti-S) and antibodies to nucleocapsid proteins (anti-N) SARS-CoV-2 proteins using an electrochemiluminescence immunoassay. To estimate the population prevalence, the PROC SURVEYMEANS statistical procedure was employed, with weighting to reflect demographic data from July 2022.
RESULTS
In total, 9,945 individuals from 5,041 households were surveyed across 258 communities, representing all basic local governments in Korea. The overall population-adjusted prevalence rates of anti-S and anti-N were 97.6% and 57.1%, respectively. Since the Korea Disease Control and Prevention Agency has reported a cumulative incidence of confirmed cases of 37.8% through July 31, 2022, the proportion of unreported infections among all COVID-19 infection was suggested to be 33.9%.
CONCLUSIONS
The K-SEROSMART represents the first nationwide, community-based seroepidemiologic survey of COVID-19, confirming that most individuals possess antibodies to SARS-CoV-2 and that a significant number of unreported cases existed. Furthermore, this study lays the foundation for a surveillance system to continuously monitor transmission at the community level and the response to COVID-19.
Summary
Korean summary
인구집단을 기반으로 하여 대표성 있는 표본을 추출하여 COVID-19 항체유병률 조사를 전국적으로 수행함으로 지역사회 단위에서 지속적으로 모니터링할 수 있는 COVID-19 감시체계 구축의 기반을 마련하였다. 2022년 8월 우리나라 국민의 대부분이 COVID-19에 대한 항체를 보유하고 있었고 인구 3명 중 1명은 미확진 감염자로 추정되었다.
Key Message
The K-SEROSMART represents the first nationwide, community-based seroepidemiologic survey of COVID-19. In August 2022, most of the Korean people had antibodies to COVID-19, and one in three people was estimated to have an unreported infection. This study lays the foundation for a surveillance system to continuously monitor transmission at the community level and the response to COVID-19.

Citations

Citations to this article as recorded by  
  • Effectiveness of the 2023-2024 monovalent XBB.1.5 vaccine against SARS-CoV-2 infection in people aged over 65 years in South Korea: a population-based cohort study
    Suyoung Jo, Seunghyun Lee, Huiseon Kim, Hyunji Won, Gi-eun Rhie, Hye-Sook Jeong, June-Woo Lee, Ah-Ra Kim, Byung Chul Chun, Kyong Ran Peck, Dong-Hyun Kim
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    Yumi Jang, Jaehun Jung, Kyong Ran Peck
    Journal of Korean Medical Science.2026;[Epub]     CrossRef
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    Young Hoon Hwang, Wan Beom Park
    Journal of Korean Medical Science.2026;[Epub]     CrossRef
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    Yifan Zhang, Won Chang, Kevin Dieckhaus, Suyoung Jo, Jina Han, Hye Jin Baek, Eunbi Noh, Kyuhyun Yoon, Jung Ae Kim, Jaehun Jung, Kyong Ran Peck, Hye-Sook Jeong, June-Woo Lee, Ah-Ra Kim, Hyeon Nam Do, Youngji Jo, Dong-Hyun Kim
    Open Forum Infectious Diseases.2026;[Epub]     CrossRef
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    Geunsoo Jang, Jihyeon Kim, Robin N. Thompson, Hyojung Lee
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    Young Hoon Hwang, Dal-Hee Min, Wan Beom Park
    Human Vaccines & Immunotherapeutics.2025;[Epub]     CrossRef
  • Evaluating the Effect of Public Health and Social Measures Under Rapid Changes in Population-level Immunity Against SARS-CoV-2: A Mathematical Modeling Study
    Sung-mok Jung, Jaehun Jung, Justin Lessler
    Epidemiology.2025; 36(3): 334.     CrossRef
  • Effect of anti-S antibody titers on newly confirmed cases of COVID-19 in Korea: a community-based cohort study (K-SEROSMART Wave 2)
    Jina Han, Jung Ae Kim, Hye Jin Baek, Eunbi Noh, Kay O. Lee, June-Woo Lee, Ah-Ra Kim, HyeonNam Do, Soon Young Lee, Dong-Hyun Kim
    BMC Infectious Diseases.2025;[Epub]     CrossRef
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    Sho Miyamoto, Tadaki Suzuki
    Vaccine.2024; 42(6): 1401.     CrossRef
  • Changes in the intrinsic severity of severe acute respiratory syndrome coronavirus 2 according to the emerging variant: a nationwide study from February 2020 to June 2022, including comparison with vaccinated populations
    Boyeong Ryu, Eunjeong Shin, Dong Hwi Kim, HyunJu Lee, So Young Choi, Seong-Sun Kim, Il-Hwan Kim, Eun-Jin Kim, Sangwon Lee, Jaehyun Jeon, Donghyok Kwon, Sungil Cho
    BMC Infectious Diseases.2024;[Epub]     CrossRef
  • Seroprevalence of SARS-CoV-2 infection in pediatric patients in a tertiary care hospital setting
    Ploy Pattanakitsakul, Chanya Pongpatipat, Chavachol Setthaudom, Mongkol Kunakorn, Thiantip Sahakijpicharn, Anannit Visudtibhan, Nopporn Apiwattanakul, Surapat Assawawiroonhakarn, Uthen Pandee, Chonnamet Techasaensiri, Sophida Boonsathorn, Sujittra Chaisav
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    In Hwa Jeong, Jong-Hun Kim, Min-Jung Kwon, Jayoung Kim, Hee Jin Huh, Byoungguk Kim, Junewoo Lee, Jeong-hyun Nam, Eun-Suk Kang
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Original Article
The relationship between poor sleep quality measured by the Pittsburgh Sleep Quality Index and smoking status according to sex and age: an analysis of the 2018 Korean Community Health Survey
Jun Hyun Hwang, Soon-Woo Park
Epidemiol Health. 2022;44:e2022022.   Published online February 14, 2022
DOI: https://doi.org/10.4178/epih.e2022022
  • 32,401 View
  • 519 Download
  • 9 Web of Science
  • 10 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
Multiple studies have found that cigarette smokers are more likely to experience sleep disturbances than non-smokers. This study aimed to examine various associations between smoking and sleep quality according to sex and age, which have yet to be sufficiently examined in prior studies.
METHODS
Data analysis was conducted using a nationally representative sample of 224,986 Korean adults who participated in the 2018 Korea Community Health Survey. Sleep quality, as the dependent variable, was measured using the Pittsburgh Sleep Quality Index (PSQI), with PSQI scores indicating either good (≤4 points) or poor (>5 points) sleep quality. Multiple logistic regression analysis was performed considering socio-demographic factors, health behaviors, comorbidities, and psychological factors as covariates.
RESULTS
The overall weighted prevalence of poor sleep quality was 39.4% (95% confidence interval, 39.1 to 39.7). In the multivariate model that excluded psychological factors, poor sleep quality positively correlated to smoking for both sexes and all age groups except for male aged ≥65 years. However, in the full model that included psychological factors, statistically significant odds ratios (approximately 1.5) for poor sleep quality according to smoking status were only observed for female under 65 years of age.
CONCLUSIONS
The relationship between poor sleep quality and smoking status differed according to sex and age. In order to improve the quality of sleep, it is necessary to intervene smoking cessation along with solving psychological problems, especially female in middle age and younger.
Summary
Korean summary
한국 성인의 39.4%는 수면의 질(피츠버그 수면의 질 지수(PSQI) 기준)이 낮았다. 성별 및 연령에 따라 흡연과 수면의 질 사이의 관련성은 다르게 나타났다. 구체적으로는 65세 이하의 여성에서 흡연은 수면의 질 악화와 관련성이 있었으나, 남성 또는 65세 이상 여성에서는 흡연과 수면의 질 간 유의한 관련성을 보이지 않았다.
Key Message
In order to improve the quality of sleep, it is necessary to intervene smoking cessation along with solving psychological problems, especially female in middle age and younger.

Citations

Citations to this article as recorded by  
  • Prevalence and Associated Factors of Poor Sleep Quality Among ‎adults in Qatar
    Mueen Al Ansi, Ayman Al-Dahshan, AA Alyafei ‎, Mohamad Chehab, Sami Abdeen, Hanan Khudadad ‎, Nada Adil, Mohamed Aabdien, Mohamed Iheb Bougmiza
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    Ioanna Grigoriou, Serafeim-Chrysovalantis Kotoulas, Konstantinos Porpodis, Dionysios Spyratos, Ioanna Papagiouvanni, Alexandros Tsantos, Anastasia Michailidou, Constantinos Mourelatos, Christina Mouratidou, Ioannis Alevroudis, Alexandra Marneri, Athanasia
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