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Cohort Profile
Cohort profile: the KDCA-Tuberculosis-NHIS cohort linking tuberculosis surveillance and health insurance data in Korea
Dawoon Jeong, Jinsun Kim, Seung Won Lee, Hongjo Choi, Hojoon Sohn, Jieun Kim, Hyewon Lee, Hyeran Jeong, Seung Eun Lee, Young-joon Park, Jaiyong Kim, Eun Mi Kim, Minji Koo, Hoyeon Jang, Young Ae Kang
Epidemiol Health. 2025;47:e2025071.   Published online December 13, 2025
DOI: https://doi.org/10.4178/epih.e2025071
  • 6,828 View
  • 115 Download
  • 5 Web of Science
  • 3 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
Despite a steady decline in incidence, tuberculosis (TB) remains a substantial public health burden in Korea, particularly among older adults. Existing national TB surveillance systems lack sufficiently comprehensive data to assess long-term outcomes and health disparities. The K-TB-N cohort integrates data from 3 national sources: the Korean Tuberculosis Surveillance System (2011-2022), the National Health Insurance Database (2010-2022), and mortality data from Statistics Korea (2010-2022). After data cleaning and linkage, the final cohort included 373,812 patients (375,440 episodes) with either drug-susceptible TB or drug- resistant TB. TB notifications declined by approximately 60% over the study period, while the median patient age continued to rise. Treatment success improved over time, accompanied by reductions in lost to follow-up. However, mortality during treatment increased, with more than half of deaths attributed to non-TB causes such as pneumonia, cancer, and cardiovascular disease. Post-treatment mortality also remained high, particularly among patients with drug-resistant TB. The K-TB-N cohort provides a comprehensive, linked dataset for advancing research on TB epidemiology, treatment outcomes, comorbidities, and health disparities. It enables evaluations of public health interventions, long-term prognosis, and strategies for post-TB care. This cohort will remain a valuable resource for shaping data-driven TB control policies in aging and high-burden settings.
Summary
Korean summary
- K-TB-N 코호트는 결핵 신고자료, 건강보험청구자료, 통계청 사망자료를 연계한 국내 최초의 전국단위 결핵 통합자료 코호트이다. - 이 코호트를 결핵 치료 성과와 치료 종료 이후 사망을 포함한 장기예후 분석이 가능하다. - 코호트에 포함된 2011-2022년 사이, 결핵 발생은 60% 감소하였고, 결핵 환자의 평균 연령은 증가하였다. 결핵 치료 중 사망율은 증가하였는데, 사망원인의 50% 이상은 비결핵성 사망이었다.
Key Message
- The K-TB-N cohort is the first national-level integrated TB cohort in South Korea that combines three distinct datasets, overcoming the limitations of single-source TB registries. - The linkage of clinical data (KTB-Surv), health insurance claims (NHID), and mortality records (Statistics Korea) allows long-term tracking of treatment outcomes and post-treatment mortality. - TB notifications declined by ~60% during the study period, while the median patient age increased. - The mortality during TB treatment rose, with over half of deaths attributed to non-TB causes.

Citations

Citations to this article as recorded by  
  • Suicide risk in people with tuberculosis in Republic of Korea: a nationwide cohort, 2012–2021
    Chiwook Chung, Seung Won Lee, Dawoon Jeong, Hongjo Choi, Hojoon Sohn, Young Ae Kang
    Infectious Diseases of Poverty.2026;[Epub]     CrossRef
  • Clinical outcomes and recurrence after treatment of asymptomatic pulmonary tuberculosis: A nationwide cohort study
    Se Hyun Kwak, Hongjo Choi, Seung Won Lee, Dawoon Jeong, Hojoon Sohn, Young Ae Kang
    International Journal of Infectious Diseases.2026; 169: 108805.     CrossRef
  • Context-dependent risk stratification using a tuberculin skin test induration threshold of ≥ 15 mm in school tuberculosis screening in Hangzhou, China: a historical cohort study
    Xiangjie Meng, Yin Tang, Jun Shou, Nan Jiang, Yu Zhang
    Tropical Medicine and Health.2026;[Epub]     CrossRef
COVID-19: Epidemiologic Investigation
Experience of a COVID-19 outbreak response in a general hospital in Gyeonggi Province, Korea
Chanhee Kim, Gawon Choi, Shin Young Park, Jieun Kim, Young Joon Park, Kyungnam Kim
Epidemiol Health. 2021;43:e2021083.   Published online October 18, 2021
DOI: https://doi.org/10.4178/epih.e2021083
  • 26,468 View
  • 159 Download
  • 4 Web of Science
  • 3 Crossref
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
Coronavirus disease 2019 (COVID-19) outbreaks in general hospitals are particularly risky because they not only overburden the regional healthcare delivery system, but also increase the possibility of community transmission. This study shares an experience of a COVID-19 outbreak response in a general hospital in Gyeonggi Province, Korea.
METHODS
Since the first COVID-19 confirmed case was recognized in Hospital A on March 29, 2020, the Immediate Response Team of Gyeonggi Province and Korea Disease Control and Prevention Agency devised a plan to conduct an epidemiological investigation and minimize the paralysis of hospital functions. Apart from the epidemiological investigation, a risk assessment of the hospital and management of contacts, including patients and workers, were also undertaken.
RESULTS
In total, 72 confirmed cases were identified, including 26 hospitalized patients, 16 healthcare personnel, 7 visitors, and 22 cases identified externally. The majority of the confirmed cases were exposed in Ward B or were contacts of people exposed in Ward A (58.3% of 72 cases). Among healthcare personnel, caregivers were found to be the most vulnerable to COVID-19 in this outbreak.
CONCLUSIONS
Preparation for all possible situations in medical facilities is important because it is difficult to find alternative resources. The findings of this study provide information on controlling the further transmission of COVID-19 and furnish evidence of the importance of ordinary management skills to be prepared for COVID-19.
Summary
Korean summary
본 연구에서는 2020년 경기도 소재 한 종합병원에서 발생한 코로나19 유행 대응 사례 경험을 공유한다. 병원 외 지역사회 전파 사례를 포함하여 총 72명의 확진자가 이 유행에서 확인되었다. 종합병원은 지역 의료전달체계에서 중요한 역할을 하고 있기 때문에 코로나19로 인해 그 기능이 마비되지 않도록 예방하는 것이 가장 바람직하며, 이를 위해서는 평상 시에 적절한 대비 체계를 갖추어 두어야 한다.
Key Message
This study shares the experience of responding to the COVID-19 outbreak at a general hospital in Gyeonggi-do, 2020. A total of 72 confirmed cases were identified, including cases of community based transmission outside the hospital. Since general hospitals play an important role in the medical delivery system, it is most desirable to prevent the function from being paralyzed by COVID-19 situation, and for this, and appropriate preparedness should be established.

Citations

Citations to this article as recorded by  
  • Diagnostic accuracy of visual triage checklist in early recognition of COVID-19 cases in the pediatric population: A retrospective cohort study
    Ayesha Imtiaz, Abdullah Y. Akkam, Lulwah H. AlThumali, Ahlam M. AlHarthi, Honey G. Porte, Wesal S. AlOsaimi, Maha M. A. AlAsmari, Rawda B. G. Salih, Biswadev Mitra
    BMC Pediatrics.2025;[Epub]     CrossRef
  • Vaccine effectiveness and the epidemiological characteristics of a COVID-19 outbreak in a tertiary hospital in Republic of Korea
    Seonhee Ahn, Tae Jong Son, Yoonsuk Jang, Jihyun Choi, Young Joon Park, Jiseon Seong, Hyun Hee Kwon, Muk Ju Kim, Donghyok Kwon
    Osong Public Health and Research Perspectives.2023; 14(3): 188.     CrossRef
  • Effect of changes in the hearing aid subsidy on the prevalence of hearing loss in South Korea
    Chul Young Yoon, Junhun Lee, Tae Hoon Kong, Young Joon Seo
    Frontiers in Neurology.2023;[Epub]     CrossRef
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