Nationwide Results of COVID-19 Contact Tracing in South Korea : Individual Participant Data From an Epidemiological Survey
©Seung Won Lee, Woon Tak Yuh, Jee Myung Yang, Yoon-Sik Cho, In Kyung Yoo, Hyun Yong Koh, Dominic Marshall, Donghwan Oh, Eun Kyo Ha, Man Yong Han, Dong Keon Yon. Originally published in JMIR Medical Informatics (http://medinform.jmir.org), 25.08.2020..
BACKGROUND: Evidence regarding the effectiveness of contact tracing of COVID-19 and the related social distancing is limited and inconclusive.
OBJECTIVE: This study aims to investigate the epidemiological characteristics of SARS-CoV-2 transmission in South Korea and evaluate whether a social distancing campaign is effective in mitigating the spread of COVID-19.
METHODS: We used contract tracing data to investigate the epidemic characteristics of SARS-CoV-2 transmission in South Korea and evaluate whether a social distancing campaign was effective in mitigating the spread of COVID-19. We calculated the mortality rate for COVID-19 by infection type (cluster vs noncluster) and tested whether new confirmed COVID-19 trends changed after a social distancing campaign.
RESULTS: There were 2537 patients with confirmed COVID-19 who completed the epidemiologic survey: 1305 (51.4%) cluster cases and 1232 (48.6%) noncluster cases. The mortality rate was significantly higher in cluster cases linked to medical facilities (11/143, 7.70% vs 5/1232, 0.41%; adjusted percentage difference 7.99%; 95% CI 5.83 to 10.14) and long-term care facilities (19/221, 8.60% vs 5/1232, 0.41%; adjusted percentage difference 7.56%; 95% CI 5.66 to 9.47) than in noncluster cases. The change in trends of newly confirmed COVID-19 cases before and after the social distancing campaign was significantly negative in the entire cohort (adjusted trend difference -2.28; 95% CI -3.88 to -0.68) and the cluster infection group (adjusted trend difference -0.96; 95% CI -1.83 to -0.09).
CONCLUSIONS: In a nationwide contact tracing study in South Korea, COVID-19 linked to medical and long-term care facilities significantly increased the risk of mortality compared to noncluster COVID-19. A social distancing campaign decreased the spread of COVID-19 in South Korea and differentially affected cluster infections of SARS-CoV-2.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:8 |
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| Enthalten in: |
JMIR medical informatics - 8(2020), 8 vom: 25. Aug., Seite e20992 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Lee, Seung Won [VerfasserIn] |
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| Links: |
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| Themen: |
COVID-19 |
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| Anmerkungen: |
Date Revised 28.09.2020 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.2196/20992 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM313589720 |
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| 100 | 1 | |a Lee, Seung Won |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Nationwide Results of COVID-19 Contact Tracing in South Korea |b Individual Participant Data From an Epidemiological Survey |
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| 500 | |a Date Revised 28.09.2020 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a ©Seung Won Lee, Woon Tak Yuh, Jee Myung Yang, Yoon-Sik Cho, In Kyung Yoo, Hyun Yong Koh, Dominic Marshall, Donghwan Oh, Eun Kyo Ha, Man Yong Han, Dong Keon Yon. Originally published in JMIR Medical Informatics (http://medinform.jmir.org), 25.08.2020. | ||
| 520 | |a BACKGROUND: Evidence regarding the effectiveness of contact tracing of COVID-19 and the related social distancing is limited and inconclusive | ||
| 520 | |a OBJECTIVE: This study aims to investigate the epidemiological characteristics of SARS-CoV-2 transmission in South Korea and evaluate whether a social distancing campaign is effective in mitigating the spread of COVID-19 | ||
| 520 | |a METHODS: We used contract tracing data to investigate the epidemic characteristics of SARS-CoV-2 transmission in South Korea and evaluate whether a social distancing campaign was effective in mitigating the spread of COVID-19. We calculated the mortality rate for COVID-19 by infection type (cluster vs noncluster) and tested whether new confirmed COVID-19 trends changed after a social distancing campaign | ||
| 520 | |a RESULTS: There were 2537 patients with confirmed COVID-19 who completed the epidemiologic survey: 1305 (51.4%) cluster cases and 1232 (48.6%) noncluster cases. The mortality rate was significantly higher in cluster cases linked to medical facilities (11/143, 7.70% vs 5/1232, 0.41%; adjusted percentage difference 7.99%; 95% CI 5.83 to 10.14) and long-term care facilities (19/221, 8.60% vs 5/1232, 0.41%; adjusted percentage difference 7.56%; 95% CI 5.66 to 9.47) than in noncluster cases. The change in trends of newly confirmed COVID-19 cases before and after the social distancing campaign was significantly negative in the entire cohort (adjusted trend difference -2.28; 95% CI -3.88 to -0.68) and the cluster infection group (adjusted trend difference -0.96; 95% CI -1.83 to -0.09) | ||
| 520 | |a CONCLUSIONS: In a nationwide contact tracing study in South Korea, COVID-19 linked to medical and long-term care facilities significantly increased the risk of mortality compared to noncluster COVID-19. A social distancing campaign decreased the spread of COVID-19 in South Korea and differentially affected cluster infections of SARS-CoV-2 | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a COVID-19 | |
| 650 | 4 | |a South Korea | |
| 650 | 4 | |a contact tracing | |
| 650 | 4 | |a coronavirus | |
| 650 | 4 | |a epidemiology | |
| 650 | 4 | |a health data | |
| 650 | 4 | |a survey | |
| 650 | 4 | |a transmission | |
| 700 | 1 | |a Yuh, Woon Tak |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Jee Myung |e verfasserin |4 aut | |
| 700 | 1 | |a Cho, Yoon-Sik |e verfasserin |4 aut | |
| 700 | 1 | |a Yoo, In Kyung |e verfasserin |4 aut | |
| 700 | 1 | |a Koh, Hyun Yong |e verfasserin |4 aut | |
| 700 | 1 | |a Marshall, Dominic |e verfasserin |4 aut | |
| 700 | 1 | |a Oh, Donghwan |e verfasserin |4 aut | |
| 700 | 1 | |a Ha, Eun Kyo |e verfasserin |4 aut | |
| 700 | 1 | |a Han, Man Yong |e verfasserin |4 aut | |
| 700 | 1 | |a Yon, Dong Keon |e verfasserin |4 aut | |
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