Risk factors for critical COVID-19 illness during Delta- and Omicron-predominant period in Korea; using K-COV-N cohort in the National health insurance service

• Kyung-Shin Lee ,

  Contributed equally to this work with: Kyung-Shin Lee, Min Jin Go

  Roles Conceptualization, Formal analysis, Writing – original draft

  * E-mail: mhkim@nmc.or.kr (M-HK); haroc153@gmail.com (H-CJ); kslee0116@nmc.or.kr (K-SL)

  Affiliation Public Health Research Institute, National Medical Center, Seoul, Korea

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• Min Jin Go ,

  Contributed equally to this work with: Kyung-Shin Lee, Min Jin Go

  Roles Conceptualization, Formal analysis, Writing – original draft

  Affiliation Division of Clinical Research, National Institute of Infectious Diseases, Korea National Institute of Health, Center for Emerging Virus Research, Cheongju, Republic of Korea

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• Youn Young Choi,

  Roles Investigation, Writing – review & editing

  Affiliation Department of Pediatrics, National Medical Center, Seoul, Korea

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• Min-Kyung Kim,

  Roles Investigation, Writing – review & editing

  Affiliation Division of Infectious Diseases, National Medical Center, Seoul, Korea

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• Jaehyun Seong,

  Roles Investigation, Writing – review & editing

  Affiliation Division of Clinical Research, National Institute of Infectious Diseases, Korea National Institute of Health, Center for Emerging Virus Research, Cheongju, Republic of Korea

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• Ho Kyung Sung,

  Roles Investigation, Methodology, Writing – review & editing

  Affiliation National Emergency Medical Center, National Medical Center, Seoul, Korea

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• Jaehyun Jeon,

  Roles Investigation, Writing – review & editing

  Affiliation Division of Infectious Diseases, National Medical Center, Seoul, Korea

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• Hee-Chang Jang ,

  Roles Conceptualization, Supervision, Writing – review & editing

  * E-mail: mhkim@nmc.or.kr (M-HK); haroc153@gmail.com (H-CJ); kslee0116@nmc.or.kr (K-SL)

  Affiliation Division of Clinical Research, National Institute of Infectious Diseases, Korea National Institute of Health, Center for Emerging Virus Research, Cheongju, Republic of Korea

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• Myoung-Hee Kim

  Roles Conceptualization, Project administration, Supervision, Writing – review & editing

  * E-mail: mhkim@nmc.or.kr (M-HK); haroc153@gmail.com (H-CJ); kslee0116@nmc.or.kr (K-SL)

  Affiliation Center for Public Health Data Analytics, National Medical Center, Seoul, Korea

  https://orcid.org/0000-0002-6122-1363

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