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Sung-il Cho 10 Articles
Seroprevalence of SARS-CoV-2 antibodies during the third wave of COVID-19 in the Seoul metropolitan area of Korea
Kyuhyun Yoon, Jayeun Kim, Kyong Ran Peck, Hyun Soo Kim, Hyukmin Lee, Yoo-Sung Hwang, Soon Young Lee, Sung-il Cho, Hun Jae Lee, Yeong-gyeong Kim, Byoungguk Kim, June-Woo Lee, Ah-Ra Kim, Hyeon Nam Do, Dong-Hyun Kim
Epidemiol Health. 2022;44:e2022085.   Published online September 30, 2022
DOI: https://doi.org/10.4178/epih.e2022085
  • 795 View
  • 82 Download
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
After the third wave of coronavirus disease 2019 (COVID-19), by mid-February 2021, approximately 0.16% of the Korean population was confirmed positive, which appeared to be among the lowest rates worldwide at that time. However, asymptomatic transmission is challenging for COVID-19 surveillance. Therefore, a community-based serosurvey of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection was conducted to understand the effectiveness of Korea’s strong containment strategy.
METHODS
We collected 5,002 residual sera samples from January 30 to March 3, 2021, from 265 medical facilities in Seoul, 346 in Gyeonggi Province, and 57 in Incheon. Sixty samples from tertiary institutions were excluded. We defined the sub-regions according to the addresses of the medical facilities where the specimens were collected. Elecsys Anti-SARS-CoV-2 was used for screening, and positivity was confirmed using the SARS-CoV-2 sVNT Kit. Prevalence was estimated using sampling weights and the Wilson score interval for a binomial proportion with a 95% confidence interval.
RESULTS
Among the 4,942 specimens, 32 and 25 tested positive for COVID-19 in the screening and confirmatory tests, respectively. The overall crude prevalence of SARS-CoV-2 antibodies was 0.51%. The population-adjusted overall prevalence was 0.55% in women and 0.38% in men. The region-specific estimation was 0.67% and 0.30% in Gyeonggi Province and Seoul, respectively. No positive cases were detected in Incheon.
CONCLUSIONS
The proportion of undetected cases in Korea remained low as of early 2021. Therefore, an infection control strategy with exhaustive tracing and widespread pre-emptive testing appears to be effective in containing community spread of COVID-19.
Summary
Korean summary
코로나19바이러스 감염병(COVID-19)의 한국 내 3차 대유행기인 2020년 말 이후, 2021년 1월 우리나라 인구의 약 0.16%가 누적 확진되었으며, 이는 세계에서 매우 낮은 비율을 보이는 국가 중 하나였습니다. 그러나 COVID-19의 무증상 전파는 감염 확산방지와 감시체계에 문제점들을 초래할 수 있어 지역사회 기반 혈청 조사를 통해 그 현황을 파악했습니다. 2021년 1월 30일부터 3월 3일까지 서울, 경기, 인천 등 수도권 소재 1, 2차 의료기관에서 수집된 혈액검체의 잔여혈청표본 4942개에 대해 Roche사의 Elecsys Anti-SARS-CoV-2를 이용한 1차 항체검사와, GenScript의 SARS-CoV-2 sVNT Kit를 이용하여 2차 중화항체유무를 확인하였다. 4942명의 검체 중 1차 검사와 2차 중화항체검사에서 각각 32명과 25명이 항체 양성이었다. SARS-CoV-2 항체의 전체 수도권 조유병률은 0.51%였습니다. 인구의 연령보정 전체 유병률은 0.47%였으며, 성별로는 여성에서 0.55%, 남성에서 0.38%였습니다. 지역별 추정치는 경기도와 서울이 각각 0.67%와 0.30%였고, 인천에서는 양성사례가 발견되지 않았습니다. 한국의 미발견 사례 비율은 누적 확진율의 3배에 달하지만, 여전히 1% 미만으로 ​​낮습니다. 철저한 추적과 광범위한 선제적 검사를 통한 감염 관리 전략이 지역사회에서 바이러스 확산을 억제하는 데 효과적이었던 것으로 보입니다.
Key Message
Around February 2021, the SARS-CoV-2 antibody test was conducted on the residual serum of adults (≥19 years) collected from primary and secondary medical institutions in the metropolitan area in South Korea. The estimated overall prevalence was 0.60% in the electrochemiluminescence immunoassay (ECLIA) detecting IgG against the nucleocapsid protein and 0.47% for the neutralization antibody. The positivity of the confirmed test using surrogate neutralizing antibodies was only 78% of the ECLIA’s results. For prevention and control measures against the spread of SARS-CoV-2 infections and new variants emerge, serosurvey targeting community-dwelling people is needed to understand the changing status in the community.
The association between tobacco or nicotine product use behaviors and non-compliance with mask-wearing during the COVID-19 pandemic: a cross-sectional study in Korea
Da-eun Lee, Heewon Kang, Sung-il Cho
Epidemiol Health. 2022;44:e2022087.   Published online October 7, 2022
DOI: https://doi.org/10.4178/epih.e2022087
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AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
It is necessary to investigate tobacco or nicotine product (TNP) use which acts as a risk factor for coronavirus disease 2019 (COVID-19) infection. Especially, wearing a mask is difficult to practice while using TNP. Therefore, this study aimed to examine the association between TNP use behaviors and non-compliance with mask-wearing during the COVID-19 pandemic.
METHODS
The samples of 208,618 Korean adults from 2020 Community Health Survey in Korea were used. As an independent variable, TNP use behaviors such as TNP use status, changes in TNP use after the COVID-19 outbreak, TNP types, and attempt to quit were analyzed. Logistic regression was performed on gender-stratified participants.
RESULTS
Among men, the odds ratio (OR) of current and former TNP users were 2.00 (95% confidence interval [CI], 1.66 to 2.40) and 1.32 (95% CI, 1.09 to 1.60), respectively, compared to never users. In women, OR was 1.50 (95% CI, 1.00 to 2.26) for former users. Cigarette use was more associated with not wearing a mask than non-cigarette tobacco or nicotine product (NCTNP) use (OR, 1.53; 95% CI, 1.12 to 2.08). Men whose TNP use decreased had lower non-compliance (OR, 0.52; 95% CI, 0.36 to 0.74); while women whose TNP use increased had lower non-compliance (OR, 0.13; 95% CI, 0.07 to 0.26).
CONCLUSIONS
Current and former users were less likely to wear masks. Cigarette use was more associated with not wearing a mask than NCTNP use. Changes in TNP use showed association for men and women; however, in the opposite direction. Therefore, more attention should be paid to TNP use prevention and cessation support during the epidemic of respiratory infectious diseases. Moreover, it is necessary to identify risk factors of cigarette users in compliance with mask-wearing.
Summary
Korean summary
담배 또는 니코틴 제품 (Tobacco or Nicotine Products, TNPs) 현재사용자와 과거사용자는 비사용자 대비 마스크 미착용 연관성이 높고, 비궐련 담배 또는 니코틴 제품 (Non-Cigarette Tobacco or Nicotine Products, NCTNPs) 사용자보다는 일반담배 사용자의 마스크 미착용 연관성이 높다. 남성에서는 코로나19 유행 이전 대비 TNPs 사용이 감소했을 때, 여성에서는 증가했을 때 마스크 미착용 연관성이 낮았다. 따라서 호흡기 감염병 유행 시기에는 더욱 TNPs 사용 예방과 금연 지원에 관심을 가질 것을 제안한다.
Key Message
During the epidemic of respiratory infectious diseases, more attention should be paid to tobacco or nicotine products (TNPs) use prevention and cessation support.
Effect of tobacco outlet density on quit attempts in Korea: a multi-level analysis of the 2015 Korean Community Health Survey
Jaehyung Kong, Sung-il Cho
Epidemiol Health. 2021;43:e2021048.   Published online August 3, 2021
DOI: https://doi.org/10.4178/epih.e2021048
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AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
This study aimed to examine whether the regional density of tobacco outlets in Korea was associated with the likelihood of attempting to quit among smokers
METHODS
This study was designed as a secondary data analysis of a cross-sectional study. Data from the 2015 Korean Community Health Survey and tobacco outlet registrations in 17 metropolitan cities and provinces with 254 communities in Korea were used for the analysis. In total, 41,013 current smokers (≥19 years of age) were included. Multi-level logistic regression analysis was conducted to investigate regional differences associated with smokers’ attempts to quit and to evaluate the effects of individual and regional characteristics on quit attempts.
RESULTS
Higher tobacco outlet density was associated with lower odds of attempting to quit. Smokers who resided in districts with the highest tobacco outlet density were 18% less likely to attempt quitting (odds ratio, 0.82; 95% confidence interval, 0.70 to 0.98) than smokers who resided in the regions with the lowest tobacco outlet density (intraclass correlation coefficient, 0.030).
CONCLUSIONS
This study showed that quit attempts were related to community-level factors, such as tobacco outlet density, as well as other individual factors. These findings support the implementation of national policies restricting the number of tobacco outlets within communities or zones and limiting tobacco marketing in tobacco outlets.
Summary
Korean summary
본 연구는 2015년 지역사회건강조사에 응답한 19세 이상 현재 흡연자 41,013명을 대상으로 금연 시도와 관련된 개인 수준의 요인과 지역 수준의 요인을 파악하기 위하여 다수준 분석을 실시하였다. 분석결과, 개인 수준의 요인뿐만 아니라 거주하는 지역의 담배소매점 밀집도가 흡연자의 금연 시도와 유의한 관계가 있는 것으로 확인되었다. 흡연조장환경 개선을 위한 담배 공급 감소 노력의 일환으로 지역사회 수준의 담배소매점 관리 정책이 필요하다.
Key Message
This study aimed to investigate whether the environment related to tobacco retailers impacts adult smokers’ attempts to quit smoking, for the first time in South Korea, using nationwide data on tobacco retailers and current smokers. Smokers who resided in districts with the highest tobacco outlet density were 18% less likely to attempt quitting (odds ratio, 0.82; 95% confidence interval, 0.70-0.98) than smokers who resided in the regions with the lowest tobacco outlet density. These findings support the implementation of national policies restricting the number of tobacco outlets within communities or zones and limiting tobacco marketing in tobacco outlets.
Recent increase in pertussis incidence in Korea: an age-period-cohort analysis
Chanhee Kim, Seonju Yi, Sung-il Cho
Epidemiol Health. 2021;43:e2021053.   Published online August 18, 2021
DOI: https://doi.org/10.4178/epih.e2021053
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  • 3 Citations
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
Pertussis or whooping cough—one of the most contagious diseases—is caused by the Gram-negative bacterium Bordetella pertussis. Despite a high vaccination rate, Korea recently experienced a resurgence of pertussis. This study explores patterns and possible explanations for this resurgence through an age-period-cohort analysis.
METHODS
Using secondary data from the infectious disease portal of the Korea Disease Control and Prevention Agency and the Korea Statistical Information Service of Statistics Korea, this study analyzed the incidence of pertussis in Korea to determine which factors contributed to the recent increase using an age-period-cohort model.
RESULTS
Analysis of the age effect indicated that the age group most vulnerable to pertussis was 0-year to 2-year-olds. Analysis of the period effect showed a sharp increase in the incidence rate after 2016. Analysis of the cohort effect showed a significant decrease in incidence beginning with the 1955 birth cohort, with the risk increasing again with the 2000s birth cohort.
CONCLUSIONS
Previous studies have suggested 3 main possible explanations for our results. First, the increased incidence rate can be attributed to contact rates. Second, the rate of immunity through natural exposure has decreased due to the low number of circulating pathogens, in turn affecting the trend of infection. Lastly, variations in pathogens may have also contributed to the increase in incidence. Given that the most significant increase in incidence was observed among infants younger than 1 year old, sufficient maternal immunity must be prioritized to provide passive immunity to newborns via the placenta.
Summary
Korean summary
본 연구는 연령-기간-코호트 모델을 활용하여 예방접종률이 높은 국가들의 백일해 재출현에 기여하는 요인에 무엇이 있는지 살펴보았다. 연령에 따른 사회적 접촉률(contact rate)의 변화, 자연노출에 의한 면역 강화(natural boosting) 기회의 감소, 그리고 백일해 병원체의 변이가 백일해 재출현의 원인일 수 있다. 분석 결과 영아 집단에서 백일해 발병률이 가장 급격한 증가가 관찰되었으며, 이는 모성면역의 확보가 중요하다는 점을 시사한다.
Key Message
This study examined factors contribute to the re-emergence of pertussis in countries with high vaccination rates using the age-period-cohort model. Changes in social contact rates according to age, reduction in immune boosting opportunities by natural exposure, and variations in pertussis pathogens may be the cause of re-emergence. As a result of the analysis, the sharpest increase in the incidence of pertussis in the infant group was observed, suggesting that securing maternal immunity is important.

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  • Post-Marketing Surveillance of Tetravalent Diphtheria-Tetanus-Acellular Pertussis and Inactivated Poliovirus (DTaP-IPV) Vaccine in South Korea, 2009 to 2015
    Young June Choe, Emmanuel Vidor, Christine Manson
    Infectious Diseases and Therapy.2022; 11(4): 1479.     CrossRef
  • ARIMA and ARIMA-ERNN models for prediction of pertussis incidence in mainland China from 2004 to 2021
    Meng Wang, Jinhua Pan, Xinghui Li, Mengying Li, Zhixi Liu, Qi Zhao, Linyun Luo, Haiping Chen, Sirui Chen, Feng Jiang, Liping Zhang, Weibing Wang, Ying Wang
    BMC Public Health.2022;[Epub]     CrossRef
  • Evaluation of Whole-Cell and Acellular Pertussis Vaccines in the Context of Long-Term Herd Immunity
    Ewa Szwejser-Zawislak, Mieszko M. Wilk, Piotr Piszczek, Justyna Krawczyk, Daria Wilczyńska, Daniela Hozbor
    Vaccines.2022; 11(1): 1.     CrossRef
Associations between socioeconomic status and blood cadmium levels in Korea
Yongho Jee, Sung-il Cho
Epidemiol Health. 2019;41:e2019018.   Published online May 15, 2019
DOI: https://doi.org/10.4178/epih.e2019018
  • 7,797 View
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  • 4 Citations
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
Although smoking is associated with both low socioeconomic status and blood cadmium (Cd) levels, the association between socioeconomic status and Cd levels remains unclear. Therefore, our study aimed to examine this association and to clarify whether smoking is a confounding or mediating variable in this relationship.
METHODS
Data (n=7,734) were drawn from the Korea National Health and Nutrition Examination Survey (KNHANES, 2008- 2011), including years that contained data on blood Cd and urinary cotinine levels. We investigated the associations of income, education, and occupation with blood Cd levels. Smoking was investigated by categorizing participants by smoking status (never, former, and current) and pack-years into quartiles. The weekly frequency of rice and barley intake was analyzed to gain insights into participants’ dietary patterns. Additionally, urinary cotinine levels were used to ensure the validity of the smoking variables.
RESULTS
Participants earning a low income and with less formal education had higher blood Cd levels. After controlling for smoking, the association between income and Cd levels substantially weakened. Further controlling for education, the association between income and Cd levels disappeared. However, there was a strong negative association between education and Cd levels, even after controlling for smoking history, pack-years, and urinary cotinine levels.
CONCLUSIONS
In cross-sectional data from the KNHANES, blood Cd levels were significantly higher among those with a low income and less formal education. Smoking history contributed to, but did not fully explain, these associations.
Summary
Korean summary
흡연은 낮은 사회경제적 상태와, 높은 혈중 카드뮴 상태 등과 관련이 있다고 보고가 되어 왔지만, 사회경제적 상태와 혈중 카드뮴 상태의 연관성은 불분명하다. 따라서, 본 연구는 혈중 카드뮴 농도와 사회경제적 상태와의 관련성을 분석하고, 흡연이라는 변수가 이 관련성에 어떠한 영향을 주는지 보고자 하였다.
Key Message

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    Jiajia Li, Zengwu Wang, Shiqi Lin, Lijun Pei, Linfeng Zhang, Xin Wang, Zuo Chen, Congyi Zheng, Yuting Kang, Lu Chen, Haoqi Zhou, Runlin Gao
    Environmental Science and Pollution Research.2022;[Epub]     CrossRef
  • The effect of blood cadmium levels on hypertension in male firefighters in a metropolitan city
    Ye-eun Jeon, Min Ji Kim, Insung Chung, Jea Chul Ha
    Annals of Occupational and Environmental Medicine.2022;[Epub]     CrossRef
  • Interactions between Environmental Factors and Glutathione S-Transferase (GST) Genes with Respect to Detectable Blood Aluminum Concentrations in Jamaican Children
    Mohammad H. Rahbar, Maureen Samms-Vaughan, Yuansong Zhao, Sepideh Saroukhani, Jan Bressler, Manouchehr Hessabi, Megan L. Grove, Sydonnie Shakespeare-Pellington, Katherine A. Loveland
    Genes.2022; 13(10): 1907.     CrossRef
  • Tobacco Smoke Exposure and Urinary Cadmium in Women from Northern Mexico
    Ángel Mérida-Ortega, Lizbeth López-Carrillo, Karla Rangel-Moreno, Natalia Ramirez, Stephen J. Rothenberg
    International Journal of Environmental Research and Public Health.2021; 18(23): 12581.     CrossRef
Age-period-cohort analysis of smoking prevalence among young adults in Korea
Yong Ho Jee, Sung-il Cho
Epidemiol Health. 2016;38:e2016010.   Published online March 19, 2016
DOI: https://doi.org/10.4178/epih.e2016010
Correction in: Epidemiol Health 2016;38(0):e2016029
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  • 4 Citations
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
Smoking prevalence among Korean men in their thirties is substantially high (approximately 50%). An in-depth analysis of smoking trends among young adults in their twenties is necessary to devise antismoking policies for the next 10 years. This study aimed to identify the contributions of age, period, and birth cohort effects on smoking prevalence in young adults.
METHODS
Subjects comprised 181,136 adults (83,947 men: 46.3%; 97,189 women: 53.7%) aged 19 to 30 years from the 2008-2013 Korea Community Health Survey. Smoking prevalence adjusted with reference to the 2008 population was applied to the age-period-cohort (APC) model to identify the independent effects of each factor.
RESULTS
For men, smoking prevalence rapidly escalated among subjects aged 19 to 22 years and slowed down among those aged 23 to 30 years, declined during 2008 to 2010 but stabilized during 2011 to 2013, and declined in birth cohorts prior to 1988 but stabilized in subjects born after 1988. However, in APC models, smoking prevalence increased with age in the 1988 to 1991 birth cohort. In this birth cohort, smoking prevalence at age 19 to 20 years was approximately 24% but increased to 40% when the subjects turned 23 to 24 years. For women, smoking prevalence was too low to generate consistent results.
CONCLUSIONS
Over the past six years and in recent birth cohorts, smoking prevalence in adults aged 19 to 30 years has declined and is stable. Smoking prevalence should be more closely followed as it remains susceptible to an increase depending on antismoking policies or social conditions.
Summary
Korean summary
우리나라 남자의 30대와 40대의 흡연율은 약 50% 수준으로 매우 높다. 앞으로 10년 뒤에 이들 연령대로 진입하는 20대와 30대 젊은 청년층의 흡연율의 추이를 심층 분석하는 것은 10년 뒤 금연정책 준비에 필요한 기초자료가 될 것이다. 이 연구의 목적은 젊은 청년의 흡연율의 변화추이에 영향을 주는 연령, 연도, 출생코호트 효과를 파악하고자 하였다. 지난 6년 동안 19-30세의 흡연율은 전체적으로 연도가 증가하고 최근 출생코호트로 올수록 감소하는 경향을 보였다. 그러나 최근 출생코호트의 흡연율은 앞으로 금연정책이나 사회적인 상황에 따라 여전히 증가할 여지가 있으므로 주의 깊은 관찰이 필요할 것으로 생각된다.
Key Message

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  • Understanding long‐term trends in smoking in England, 1972–2019: an age–period–cohort approach
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Age-period-cohort analysis of smoking prevalence among young adults in Korea
Yong Ho Jee, Sung-il Cho
Epidemiol Health. 2016;38:e2016029.   Published online July 8, 2016
DOI: https://doi.org/10.4178/epih.2016029
Corrects: Epidemiol Health 2016;38(0):e2016010
  • 10,375 View
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  • 1 Citations
AbstractAbstract PDF
Abstract
This article was initially published in the Epidemiology and Health 2016;38:e2016010, with an error in Figure 1C that duplicated Figure 1E. The authors would like to correct Figure 1C as below.
Summary
Korean summary
Key Message

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  • Gender and tobacco epidemic in South Korea: implications from age-period-cohort analysis and the DPSEEA framework
    Sera Kim, Garam Byun, Garam Jo, Dahyun Park, Sung-Il Cho, Hannah Oh, Rockli Kim, S V Subramanian, Sungha Yun, Kyungwon Oh, Jong-Tae Lee, Min-Jeong Shin
    BMJ Open.2022; 12(4): e058903.     CrossRef
Effect change of obesity on diabetes depending on measurement: self-reported body mass index from 2012 Community Health Survey vs. directly measured from the Korea National Health and Nutrition Examination Survey
Kyuhyun Yoon, Kyungduk Min, Heeran Chun, Soong-Nang Jang, Sung-il Cho
Epidemiol Health. 2015;37:e2015001.   Published online January 6, 2015
DOI: https://doi.org/10.4178/epih/e2015001
  • 15,110 View
  • 167 Download
  • 1 Citations
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
Obesity is a well-recognized risk factor for type 2 diabetes mellitus (DM) among young and middle-aged adults in South Korea. To elaborate on the association between obesity and DM, subjective data from self-reporting survey or objective data from health examination is generally used. This study was conducted to validate the change of association from using these different measurements.
METHODS
Community Health Survey data and Korea National Health and Nutrition Examination Survey data, as subjective and objective data respectively, were used. Population, resident in Seoul and over 45 aged, were selected for the study and the association between obesity and DM were defined by using multivariate logistic regression model.
RESULTS
In subjective data, DM prevalence was 12.4% (male, 14.7; female, 10.6) and obesity prevalence was 26.0% (male, 29.2; female, 23.4). Whereas, in objective data, DM prevalence was 15.0% (male, 17.8; female, 12.9), and obese population was 32.4% (male, 34.4; female, 30.8). Based on the effect of obesity on DM prevalence from each data, using objective data increased the impact of obesity. Difference of relative risk of obesity between from subjective data and from objective was bigger in female than male and statistically significant.
CONCLUSIONS
The differences of association pattern between subjective and objective data were found, due to higher obesity prevalence in objective data, and discrepancies of socio-economic status. These discrepancies could be inevitable Therefore we have to face them proactively, and understand the different aspect of various variables from different measurement.
Summary
Korean summary
지역사회건강조사는 각 지역의 건강관련 지표들을 제시하기 위한 기본 목적을 가지고 있으나, 자가보고를 통한 자료수집에 의존하고 있다는 면에서 연구결과의 신뢰성에 한계를 가지고 있다고 인식되어왔다. 본 연구는 실측자료와 자가보고자료에서의 분석결과차이를 파악함으로써, 이러한 인식에 대한 직접적 평가와 더불어, 자가보고자료에 대한 활용도 증진에 기여하고자 하였다. 연구 결과, 비만의 당뇨병에 대한 영향은 실측자료보다 자가보고자료에서 더 작아졌고, 이러한 차이는 남성에서보다 여성에서 더 크게 나타났다.
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    Ji Son Ki, Ho Kim
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Epidemiologic features of the first MERS outbreak in Korea: focus on Pyeongtaek St. Mary’s Hospital
Kyung Min Kim, Moran Ki, Sung-il Cho, Minki Sung, Jin Kwan Hong, Hae-Kwan Cheong, Jong-Hun Kim, Sang-Eun Lee, Changhwan Lee, Keon-Joo Lee, Yong-Shik Park, Seung Woo Kim, Bo Youl Choi
Epidemiol Health. 2015;37:e2015041.   Published online September 17, 2015
DOI: https://doi.org/10.4178/epih/e2015041
  • 18,744 View
  • 265 Download
  • 28 Citations
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
This study investigated the epidemiologic features of the confirmed cases of Middle East Respiratory Syndrome (MERS) in Pyeongtaek St. Mary’s Hospital, where the outbreak first began, in order to identify lessons relevant for the prevention and control of future outbreaks.
METHODS
The patients’ clinical symptoms and test results were collected from their medical records. The caregivers of patients were identified by phone calls.
RESULTS
After patient zero (case #1) was admitted to Pyeongtaek St. Mary’s Hospital (May 15-May 17), an outbreak occurred, with 36 cases between May 18 and June 4, 2015. Six patients died (fatality rate, 16.7%). Twenty-six cases occurred in the first-generation, and 10 in the second-generation. The median incubation period was five days, while the median period from symptom onset to death was 12.5 days. While the total attack rate was 3.9%, the attack rate among inpatients was 7.6%, and the inpatients on the eighth floor, where patient zero was hospitalized, had an 18.6% attack rate. In contrast, caregivers and medical staff showed attack rates of 3.3% and 1.1%, respectively.
CONCLUSIONS
The attack rates were higher than those of the previous outbreaks in other countries. The outbreak spread beyond Pyeongtaek St. Mary’s Hospital when four of the patients were moved to other hospitals without appropriate quarantine. The best method of preventing future outbreaks is to overcome the vulnerabilities observed in this outbreak, such as ward crowding, patient migration without appropriate data sharing, and the lack of an initial broad quarantine.
Summary
Korean summary
평택성모병원에서는 총 36명의 메르스 환자가 발생하여 이중 6명이 사망하였다. 또한 평택성모병원 유행의 발병률은 기존에 알려진 것보다 높았다. 한국의 메르스 유행이 시작된 평택성모병원에서 나타난 초기 방역 부족, 적절한 정보공유 없이 환자들이 병원간에 이동하는 것, 혼잡한 병동 문제 등의 감염병 전파 취약점을 극복하는 것이 향후 새로운 감염병 유행을 막을 수 있는 최선의 방법이 될 것이다.
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Test-retest reliability of health behavior items in the Community Health Survey in South Korea
Soo Jeong Kim, Jin A Han, Young Hwa Kim, Bo Youl Choi, Su Young Kim, Hun Je Lee, In Hwan Oh, Sung-il Cho, Jakyoung Lee, Soon Young Lee
Epidemiol Health. 2015;37:e2015045.   Published online October 20, 2015
DOI: https://doi.org/10.4178/epih/e2015045
  • 15,232 View
  • 137 Download
  • 6 Citations
AbstractAbstract AbstractSummary PDF
Abstract
OBJECTIVES
Responses to health-related items on the Community Health Survey (CHS) provide evidence that is used to develop community-based health policy. This study aimed to assess the test-retest reliability of selected health behavioral items on the CHS according to item category, response period, and response scale.
METHODS
A sample of 159 men and women 20 to 69 years of age participated in a test-retest with an interval of 14 to 21 days. A total of 28 items relating to smoking, alcohol consumption, diet and weight control, and mental health were selected. We evaluated the test-retest reliability of the items using kappa statistics.
RESULTS
Kappa values ranged from 0.44 to 0.93. Items concerning habits had higher kappa values (mean, 0.7; standard error, 0.05) than items concerning awareness or attitudes (p=0.012). The kappa value of items with two- to four-point scales was 0.63, which was higher than the value of 0.59 for items with scales involving five or more points, although this difference was not statistically significant. Different kappa values were observed for each reference period, but no statistically significant differences were noted.
CONCLUSIONS
The test-retest reliability of the CHS items that we studied was associated with item category. Further study of the relationship between item category and reliability in domains other than health behaviors is required.
Summary
Korean summary
이 연구는 지역사회건강조사의 건강행태 문항 중 28개 문항에 대하여 문항의 특성, 준거기간, 보기의 척도에 따라 조사-재조사 신뢰도의 차이를 분석하였다. 전체 문항의 카파값의 범위는 0.44-0.93이었다. 문항의 특성별로는 인지 또는 태도에 비해 습관에 관한 문항의 신뢰도가 높았으며, 보기의 척도가 5점 척도 이상에 비해 2-4점 척도의 신뢰도가 높음을 확인하였다.
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Epidemiol Health : Epidemiology and Health