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5 "Jaiyong Kim"
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Effect of the human papillomavirus vaccine on the risk of genital warts: a nationwide cohort study of Korean adolescent girls
Jaeyoung Cho, Eun Mi Kim, Jihye Kim, Ju-Young Shin, Eui Hyeok Kim, Jong Heon Park, Seunghyun Lewis Kwon, Geun-Yong Kwon, Soon-Ae Shin, Jaiyong Kim
Epidemiol Health. 2024;46:e2024040.   Published online March 18, 2024
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AbstractAbstract AbstractSummary PDF
The purpose of this study was to assess the effectiveness of human papillomavirus (HPV) vaccination administered to adolescent girls through Korea’s National Immunization Program.
This retrospective cohort study included patients who were 12-13 years old, whether vaccinated or unvaccinated, between July 2016 and December 2017. The incidence of genital warts (GWs) was monitored through 2021. Time-stratified hazard ratios (HRs) were estimated, adjusting for birth year, socioeconomic status, and the level of urbanization of the region, and were presented with 95% confidence intervals (CIs). Data were sourced from the Immunization Registry Integration System, linked with the National Health Information Database.
The study included 332,062 adolescent girls, with an average follow-up period of approximately 4.6 years. Except for the first year, the HRs for the vaccinated group were lower than those for the unvaccinated group. The HRs for specific cut-off years were as follows: year 2, 0.62 (95% CI, 0.31 to 1.13); year 3, 0.58 (95% CI, 0.35 to 0.96); and year 4 and beyond, 0.39 (95% CI, 0.28 to 0.52).
Our findings indicate that HPV vaccination was associated with a reduction in the risk of GWs among adolescent girls. Notably, this reduction became significant as the incidence of GWs increased with age.
Korean summary
이 연구는 후향적 코호트 연구로써, HPV 예방접종이 한국의 여자 청소년에서 생식기사마귀 질환의 위험을 감소시키는 것과 연관성이 있다는 것을 보여주었다. 따라서 단기적으로 한국의 국가예방접종 사업은 생식기사마귀 질환에 있어 효과가 있었다고 볼 수 있다. 향후에는 전암성 병변 또는 암 등과 같은 심각한 질환에 대한 백신의 영향을 확인할 필요가 있다.
Key Message
In this retrospective cohort study, our results demonstrated that HPV vaccination is associated with a reduction in the risk of GWs among adolescent girls. In the short term, the NIP of Korea can be considered effective in providing protection against GWs. Future studies need to analyze the impact of vaccines on more serious diseases such as precancerous lesions or cancer.
The coverage rates for influenza vaccination and related factors in Korean adults aged 50 and older with chronic disease: based on 2016 Community Health Survey data
Kyeong Hyang Byeon, Jaiyong Kim, Boyoung Choi, Bo Youl Choi
Epidemiol Health. 2018;40:e2018034.   Published online July 24, 2018
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  • 11 Web of Science
  • 14 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
This study aims to identify the coverage rates for influenza vaccination and related factors depending on chronic disease in Korean adults aged 50 and older.
The 2016 Korea Community Health Survey was used for analysis. Chi-square test was performed to investigate the coverage rates for influenza vaccination depending on chronic disease, and a multiple logistic regression analysis was used to identify the factors associated with influenza vaccination, by chronic disease.
In men with ≥1 chronic disease, 39.8% of 50-64 years of age, and 86.8% of elderly (over 65 years of age) received influenza vaccination. In women with ≥1 chronic disease, 58.7% of 50-64 years of age, and 89.9% of elderly (over 65 years of age) received influenza vaccination (p<0.001). The chronic diseases associated with influenza vaccination were hypertension (odds ratio [OR], 1.27; 95% confidence interval [CI], 1.19 to 1.37), diabetes (OR, 1.41; 95% CI, 1.28 to 1.55) in men aged 50-64, hypertension (OR, 1.34; 95% CI, 1.20 to 1.49), diabetes (OR, 1.17; 95% CI, 1.02 to 1.33), chronic cardiovascular disease (OR, 1.31; 95% CI, 1.07 to 1.60) in elderly (over 65 years of age). In women aged 50-64, hypertension (OR, 1.39; 95% CI, 1.30 to 1.49), diabetes (OR, 1.51; 95% CI, 1.35 to 1.68), chronic cardiovascular disease (OR, 1.31; 95% CI, 1.05 to 1.64), and hypertension (OR, 1.55; 95% CI, 1.40 to 1.71), diabetes (OR, 1.27; 95% CI, 1.12 to 1.43) in elderly (over 65 years of age).
Populations in aged 50-64 are recommendation subject for vaccination or classified as high-risk group in case with chronic disease. Though subject over 60 years old is age close to the elderly, the coverage rates for vaccination was low. It is necessary to devise strategies to raise the coverage rates for vaccination.
Korean summary
매년 인플루엔자 환자수는 증가하는 추세이며 인플루엔자로 인한 의료이용의 질병부담은 커질 것으로 생각된다. 국내에서는 우선접종 권장대상자들에게 예방접종을 받도록 권고하고 있으며, 예방접종은 인플루엔자를 예방할 수 있는 비용 효과적인 방법이다. 65세 이상 대상자는 국가 무료 예방접종 사업 대상으로 인해 예방접종률이 높은 것으로 확인되었다. 50-64세 인구는 예방접종 권고 대상자임에도 불구하고 낮은 것으로 나타났고, 50-64세 연령에서 만성질환을 동반할 경우 고위험군이지만 여전히 낮은 예방접종률을 보였다. 또한 50-64세 연령에서 1개 이상 만성질환을 동반할 경우 대도시, 중소도시에 거주하는 것보다 군지역에 거주할 경우 높은 예방접종률을 확인함으로써 대도시 및 중소도시에 거주하는 50-64세 연령에 대해 예방접종률을 올릴 수 있는 적극적인 예방접종 홍보가 필요할 것으로 생각한다.


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Occupational Cancer Surveillance System Using Data Linkage Analysis in Korea.
Sang Yun Lee, Jaiyong Kim, Seongwoo Choi, Hyungjun Im, Kijung Yoon, Ho Jang Kwon, Soo Hun Cho, Daehee Kang
Korean J Epidemiol. 1999;21(2):276-282.
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AbstractAbstract PDF
To develop the occupational cancer surveillance system in Korea, data linkage analysis was performed on the subjects of Health-monitoring-pocketbook (the list of subjects who were exposed to selected occupational carcinogens) and the retired workers of a cokes manufacturing factory using the Korean medical insurance data, Korean death certificate data and Korean cancer registry data. Study subjects comprised the 822 retired subjects and the 3101 present-post subjects of Health-monitoring-pocketbook and the 182 retired workers of a cokes manufacturing factory. The incidence of cancer of these study subjects was ascertained by linkage of Korean medical insurance data of year 1995-6, Korean death certificate data of year 1992-8 and Korean cancer registry data of year 1993-5. In the study subjects, Eighty seven percent were males and mean age was 39.3+/-8.9 year-old, Average work duration was 8.0+/-5.5 years. Chrome, asbestos and cokes were the most frequent exposed agents. In the study subjects, total 13 cancer cases were ascertained by data linkage analysis. In the ascertained cancer cases, 8 cases were male and 5 cases were female, and 7 cases were aged 40-49 yr, 5 cases were aged 50-59 yr and 1 cases were aged 30-39 yr. The commonest exposure agent in the ascertained cancer cases was asbestos and cokes. By the site of cancer, 3 stomach cancer cases, 2 hematopoietic cancer cases and 2 biliary tract cancer cases were ascertained. The occupational cancer surveillance system using data linkage analysis on the workers exposed to hazardous agents was the most feasible and efficient method in Korea. And to do this, establishment of occupational history information in several disease registry database is needed with the effort of estimating the proper size of workers exposed hazardous agents.
The Usefulness of the Secondary Database for Occupational Asthma Surveillance System in Korea.
Hyungjune Im, Sungwoo Choi, Jaiyong Kim, Sang Yun Lee, Kijung Yoon, Youngju Lee, Ho Jang Kwon, Daehee Kang, Soo Hun Cho
Korean J Epidemiol. 1999;21(2):266-275.
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AbstractAbstract PDF
Occupational asthma is defined as a disease that is characterized by airway narrowing and bronchial hyperresponsiveness caused by specific working environment. It is estimated that occupational asthma cases in Korea have been underreported. This study, using Korean Medical Insurance Data(KMID), examined the distribution of asthma patients' occupations and the frequency of high risk occupations for occupational asthma in Seoul, Korea to evaluate the usefulness of the KMID data as a database for active occupational asthma surveillance system. Six hundreds and forty two(30.7%) of 2093 patients who were finally chosen as a study population by using 1995-year KMID, were contacted by telephone. 296 persons(47.4%) of 642 patients replied that they were diagnosed as asthma. The occupations of 296 asthma patients were classified by Korean standardized industrial classfication (KSIC). The most common occupations included Wholesale and Retail trade(19.5%), Real estate, Renting and Business activities(14.9%), Construction(14.9%), Manufacturing(12.3%). Forty(13.5%) of 296 patients who could be classified by KSIC were working at high risk jobs for occupational asthma. KMID could be used as a useful data for occupational asthma surveillance system if the limitations of KMID, which is the accuracy of diagnosis, data accessibility, difficulty of following up study subjects, would be solved. The prevalence of occupational asthma could be estimated if the follow-up study diagnosing occupational asthma for asthma patients working in high risk jobs would be held.
Measurement Errors on Normotensive Subjects in Screening Test.
Jong Myon Bae, Dae Sung Kim, Jaiyong Kim, Yoon Ok Ahn
Korean J Epidemiol. 1999;21(1):1-7.
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AbstractAbstract PDF
Blood pressure measurements with a mercury sphygmomanometer serve as the screening test to establish the clinical diagnosis of primary hypertension. But one of the problems of hypertension screening is the variability of blood pressure measurements.
In order to identify the measurement error of blood pressure through the biennial health screening program of Korea Insurance Medical Corporation, we compared the blood pressure of screening test with true value which defined as the mean of blood pressures taken from the direct contact and twice check-up among normotensive Seoul Cohort participants.
Three hundred forty-nine participants had both data of screening measurement and survey of direct contact. The means of difference in systolic and diastolic blood pressure between both data were 8.47 mmHg and 6.54 mmHg, respectively. These results showed statistical significance with paired t-test (p=0.001).
Our findings indicated that screening measurement of blood pressure had false negative. And if a epidemiologic study about blood pressure used the data of screening test, it should adjust value of systolic and diastolic blood pressure with adding 8 and 7 mmHg, respectively.

Epidemiol Health : Epidemiology and Health