ID | 65198 |
Sort Key | 7
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Title Alternative | A descriptive analysis for the comparison of the symptoms and severity of coronavirus disease 2019 (COVID-19) in each epidemic period in Okayama City
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Author |
Matsuo, Rumi
Department of Epidemiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Matsumoto, Naomi
Department of Epidemiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
Kadowaki, Tomoka
Department of Epidemiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Mitsuhashi, Toshiharu
Center for Innovative Clinical Medicine, Okayama University Hospital
Kaken ID
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Takao, Soshi
Department of Epidemiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
Yorifuji, Takashi
Department of Epidemiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
ORCID
Kaken ID
publons
researchmap
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Abstract | Japan experienced four major epidemic periods (i.e., the 3rd-6th waves) of COVID-19 from January 2020 to March 2022. A different strain predominated in each period: the wild-type strain, an Alpha variant, a Delta variant, and an Omicron variant were predominant in waves 3, 4, 5, and 6, respectively. In this study, we conducted a descriptive analysis to investigate the differences in symptoms and severity during each epidemic period. We analyzed a total of 31,037 patients with COVID-19 who were reported to the Okayama City Public Health Center between February 1, 2020 and March 31, 2022. We described and compared the proportion of symptoms, the number and proportion of severe COVID-19 cases, and the number and proportion of deaths for each epidemic period. We also compared the proportion of severe COVID-19 cases depending on the number of vaccinations for the 5th and 6th waves.
Differences in symptoms and severity were observed in each epidemic period. In the 5th and 6th waves, the results suggested that vaccination had a preventive effect against severe COVID-19. |
Keywords | 新型コロナウイルス感染症(coronavirus disease 2019 )
COVID-19
症状(symptom)
重症度(severity)
ワクチン(vaccination)
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Note | 原著(Original)
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Publication Title |
Journal of Okayama Medical Association
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Published Date | 2022-12-01
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Volume | volume134
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Issue | issue3
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Publisher | 岡山医学会
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Publisher Alternative | Okayama Medical Association
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Start Page | 160
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End Page | 165
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ISSN | 0030-1558
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NCID | AN00032489
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Content Type |
Journal Article
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Related Url | isVersionOf https://doi.org/10.4044/joma.134.160
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OAI-PMH Set |
岡山大学
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language |
Japanese
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Copyright Holders | Copyright (c) 2022 岡山医学会
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File Version | publisher
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Refereed |
True
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DOI | |
Eprints Journal Name | joma
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