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Seungmin Jeong 1 Article
Correlations between regional characteristics of counties and the ratio of intracounty to extracounty sources of COVID-19 in Gangwon Province, Republic of Korea
Seungmin Jeong, Chaeyun Lim, Sunhak Bae, Youngju Nam, Eunmi Kim, Myeonggi Kim, Saerom Kim, Yeojin Kim
Osong Public Health Res Perspect. 2023;14(3):219-223.   Published online June 8, 2023
DOI: https://doi.org/10.24171/j.phrp.2023.0014
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Graphical AbstractGraphical Abstract AbstractAbstract PDF
Objectives
This study aimed to examine the correlations between the regional characteristics of counties in Gangwon Province, Republic of Korea and the ratio of intracounty to extracounty sources of coronavirus disease 2019 (COVID-19) infection.
Methods
The region of the infectious contact was analysed for each COVID-19 case reported in Gangwon Province between February 22, 2020 and February 7, 2022. The population, population density, area, the proportion of urban residents, the proportion of older adults (>65 years), financial independence, and the number of adjacent counties were assessed for each of the 18 counties in Gangwon Province. Correlation coefficients between regional characteristics and the ratio of intracounty to extracounty infections were calculated.
Results
In total, 19,645 cases were included in this study. The population, population density, proportion of older adults, and proportion of urban residents were significantly correlated with the ratio of intracounty to extracounty infections. A stratified analysis with an age cut-point of 65 years showed that the proportion of older adults had a significant negative correlation with the ratio of intracounty to extracounty infections. In other words, the proportions of extracounty infections were higher in countries with higher proportions of older adults.
Conclusion
Regions with ageing populations should carefully observe trends in infectious disease outbreaks in other regions to prevent possible transmission.

PHRP : Osong Public Health and Research Perspectives