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Ah-Young Lim 4 Articles
Decreased birth weight after prenatal exposure during wildfires on the eastern coast of the Republic of Korea in 2000
En-Joo Jung, Ah-Young Lim, Jong-Hun Kim
Epidemiol Health. 2022;e2023003.   Published online December 9, 2022
DOI: https://doi.org/10.4178/epih.e2023003    [Accepted]
  • 259 View
  • 42 Download
AbstractAbstract PDF
Abstract
Objectives
In April 2000, a series of wildfires occurred simultaneously in five adjacent small cities located on the eastern coast of the Republic of Korea. These wildfires burned approximately 23,794 hectares of forestland over several days. We investigated the effects of birth weight associated with prenatal exposure to the by-products generated by wildfire disasters.
Methods
Birth weight data were obtained for 1999–2001 from the birth registration database of the Korean National Statistical Office, and matched with the zip-code, exposed/unexposed pregnancy week number for days of the wildfires. Then, generalized linear models were used to assess the associations between birth weight and exposure to wildfire after adjusting for fetal sex, gestational age, parity, maternal age, maternal education, paternal education, and exposed average atmospheric temperature.
Results
Compared with unexposed pregnancies before and after the wildfires, mean birth weight decreased by 41.4 g [95% confidence interval (CI): -72.4, -10.4] when exposed to wildfire during the first trimester, 23.2 g [95% CI: -59.3, 13.0] during the second trimester, and 27.0 g [95% CI: -63.8, 9.8] during the third trimester. In the adjusted model for infants exposed in utero during any trimester, the mean birth weight decreased by 32.5 g [95% CI: -53.2, -11.7].
Conclusions
We observed a 1% reduction in birth weight after wildfire exposure. Thus, exposure to by-products generated during a wildfire disaster during pregnancy may cause fetal growth retardation and developmental delays.
Summary
Korean summary
Key Message
Viral shedding patterns of the symptomatic SARS-CoV-2 infection according to virus-type dominant periods and vaccination status in Gyeonggi Province, Korea
Gawon Choi, Ah-Young Lim, Sojin Choi, Kunhee Park, Soon Young Lee, Jong-Hun Kim
Epidemiol Health. 2022;e2023008.   Published online December 21, 2022
DOI: https://doi.org/10.4178/epih.e2023008    [Accepted]
  • 275 View
  • 29 Download
AbstractAbstract PDF
Abstract
Objectives
We compared the viral cycle threshold (Ct) value of infected patients to better understand the viral kinetics during the dominant period in which a specific virus type according to the vaccination status in Gyeonggi Province, Republic of Korea.
Methods
We obtained case-specific data from the COVID-19 surveillance system, Gyeonggi in-depth epidemiologic report system, and Health Insurance Review & Assessment (HIRA) Service from January 2020 to January 2022. We defined the dominant periods according to the viral sequencing test result and explored Ct values. Using a generalized additive model, we performed a nonlinear regression analysis to determine viral kinetics over time.
Results
Cases in the delta variant dominant period had higher viral shedding patterns than cases in other periods. The temporal change of virus shedding did not differ according to the vaccination status in the omicron variant dominant period but decreased in patients who completed the third vaccination in the delta variant dominant period. The time from symptom onset to peak viral shedding based on the E gene in the case of the omicron and delta variant dominant periods was approximately 2.4 days (95% CI: 2.2-2.5) and 2.1 days (95% CI: 95% CI: 2.0-2.1), respectively.
Conclusions
In the one-time tests conducted to diagnose SARS-CoV-2 infection in a large population, although individual characteristics were not adjusted, it was confirmed that the viral shedding differed according to the dominant strain and vaccination history. These analysis results give utilization value for hundreds of thousands of test data produced at SARS-CoV-2 screening test centers.
Summary
Korean summary
Key Message
Trends of accidental carbon monoxide poisoning in Korea, 1951-2018
Jong-Hun Kim, Ah-Young Lim, Hae-Kwan Cheong
Epidemiol Health. 2020;42:e2020062.   Published online August 31, 2020
DOI: https://doi.org/10.4178/epih.e2020062
  • 8,161 View
  • 193 Download
  • 2 Citations
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
Carbon monoxide (CO) poisoning from coal briquette combustion has been a major public health problem in Korea. In this study, we estimated the time trends of the consumption of anthracite coal and the number of CO poisoning victims over the past 7 decades, in the context of changes in heating facilities.
METHODS
Using Population and Housing Census data and energy statistics, we estimated the number of houses using briquettes as heating fuel between 1951 and 2018. After estimating the incidence of CO poisoning in housing units by heating facility type, we determined the ratio of the number of household members who experienced CO poisoning to the overall number of household members. Finally, we estimated the distribution of the victims according to poisoning severity, excluding victims of intentional exposure.
RESULTS
We estimated that, overall, over 26 million people experienced CO poisoning between 1951 and 2018 in Korea. The household consumption of anthracite peaked in 1986, but the number of victims of CO poisoning peaked at approximately 1 million people in 1980. From 1951 to 2018, the cumulative number of CO poisoning victims comprised approximately 22,830,000 mild cases, 3,570,000 severe cases, and 65,000 deaths.
CONCLUSIONS
The peak in the number of CO poisoning victims occurred 6 years earlier than the peak in the number of people using briquettes for heating. This gap resulted from improvements in briquette heating systems. This finding provides a quantitative basis for epidemiological studies on the health outcomes of CO poisoning in the Korean population.
Summary
Korean summary
과거에 연탄을 난방 연료로 사용함으로써 발생하였던 일산화탄소 중독 사고는 한국 사회에서 주요한 공중 보건 문제였다. 본 연구에서는 지난 70년간 연탄 소비에 따른 일산화탄소 중독 피해자 규모를 추정하였다. 본 연구에서 산출된 결과들은 일산화탄소 중독으로 인하여 지속적으로 나타날 수 있는 건강 피해에 대한 역학 연구의 정량적 근거를 제공하고 있다.
Key Message

Citations

Citations to this article as recorded by  
  • Acute carbon monoxide poisoning in Shandong, China: an observational study
    Lina Zhang, Di Wu, Mingyue Xu, Yonghui Bian, Youcun Wang, Guangkai Gao, Qing Sun
    Chinese Medical Journal.2022; 135(13): 1539.     CrossRef
  • Development of delayed neurologic sequelae in acute carbon monoxide poisoning cases caused by briquette-based kotatsu
    Makoto Onodera, Yasuhiko Tsukada, Tsuyoshi Suzuki, Kotaro Sorimachi, Kenichi Ebihara, Lubna Sato, Rie Zenda, Satoshi Ueno, Kazuki Sugaya, Ken Iseki
    Medicine.2021; 100(16): e25009.     CrossRef
A small window into the status of malaria in North Korea: estimation of imported malaria incidence among visitors from South Korea
Jisun Sung, Hae-Kwan Cheong, Ah-Young Lim, Jong-Hun Kim
Epidemiol Health. 2020;42:e2020068.   Published online November 21, 2020
DOI: https://doi.org/10.4178/epih.e2020068
  • 5,357 View
  • 155 Download
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
This study aimed to develop hypotheses on trends in malaria incidence in North Korea using malaria incidence among South Korean visitors to North Korea.
METHODS
The number of South Korean tourists who visited Mount Kumgang from 2000 to 2008 and the number of South Korean employees at the Kaesong Industrial Complex from 2005 to 2015 were obtained from the Korean Statistical Information Service. The number of malaria cases among South Koreans who visited North Korea was obtained from a previous report. The incidence of malaria per 100,000 person-years was calculated using these data and compared with the malaria incidence in North Korea derived from published articles.
RESULTS
A high incidence of malaria in 2001 and a sharp decline in the following years were observed in both South and North Korean data. Since then, North Korean data showed a relatively low and stable incidence, but the incidence among South Koreans visiting North Korea increased in 2006. Considering the trends in mass primaquine preventive treatment, floods, and economic growth rate, the incidence of malaria may have increased in North Korea in 2006. Since 2009, the incidence of malaria decreased gradually according to both South and North Korean data.
CONCLUSIONS
The trends of malaria incidence in North Korea could be reflected through its incidence among South Koreans who visited North Korea. For future inter-Korean collaboration aiming to eradicate malaria, we propose that a North Korean malaria monitoring system be established applying this method.
Summary
Korean summary
본 연구는 2000-2008년 금강산을 여행한 대한민국 국민과 2005-2015년 개성공단에서 근무한 대한민국 국민에서의 말라리아 발생률을 추정하여 국제사회에 보고된 북한의 말라리아 발생률과 비교 평가하였다. 향후 남북한의 교류가 활성화 되었을 때 북한을 방문하고 돌아온 국민에서의 말라리아 발생률 자료를 사용하여 북한 현지에서의 말라리아 발생률 현황 추이를 살펴볼 수 있을 것으로 보인다.
Key Message

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