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PHRP : Osong Public Health and Research Perspectives

OPEN ACCESS. pISSN: 2210-9099. eISSN: 2233-6052
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"Eunjeong Shin"

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"Eunjeong Shin"

Original Article
Risk factors for deaths associated with COVID-19 according to the cause of death classification in Republic of Korea
Na-Young Kim, Seong-Sun Kim, Hyun Ju Lee, Dong Hwi Kim, Boyeong Ryu, Eunjeong Shin, Donghyok Kwon
Osong Public Health Res Perspect 2023;14(2):89-99.
Published online April 18, 2023
DOI: https://doi.org/10.24171/j.phrp.2022.0312
<b>Objectives</b><br/>This study aimed to classify coronavirus disease 2019 (COVID-19)-related deaths according to whether COVID-19 was listed as the cause of death, and to investigate the differences in demographic characteristics and risk factors for COVID-19 death classifications. <br/><b>Methods</b><br/>A total of 5,625 deaths in South Korea among patients with confirmed COVID-19 from January 20, 2020 to December 31, 2021 were selected. Excluding false reports and unnatural deaths, 5,597 deaths were analyzed. Based on death report data, deaths were classified according to whether the cause of death was listed as COVID-19 (CD) or not (NCD). The epidemiological characteristics and causes of deaths were investigated using descriptive, univariate, and multivariate statistical analyses. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to analyze the risk factors. <br/><b>Results</b><br/>The case fatality ratio was 0.89% and increased with age. Additionally, 96.4% of the subjects had an underlying disease, and 53.4% died in winter. The proportion of NCDs was 9.3%, of whom 19.1% died at home and 39.0% were confirmed to have COVID-19 after death. Malignant neoplasms (102/416 vs. 637/4,442; OR, 1.71; 95% CI, 1.36−2.16; p<0.001) were significantly associated with NCD. <br/><b>Conclusion</b><br/>This is the first study to analyze risk factors by cause of death using COVID-19 death report data in South Korea. These results are expected to be used as evidence for establishing a death monitoring system that can collect timely information in a new infectious disease pandemic.
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