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Cohort Profile
Korea Nurses’ Health Study and the health of reproductive-aged women: a cohort profile
Chiyoung Cha, Heeja Jung, Sue Kim, Jung Eun Lee, Kwang-Pil Ko, Eunyoung Cho, Hyun-Young Park, Joong-Yeon Lim, Bo Mi Song, Sihan Song, Soojin Park, Aram Cho
Epidemiol Health. 2024;46:e2024048.   Published online April 30, 2024
DOI: https://doi.org/10.4178/epih.e2024048
  • 2,069 View
  • 112 Download
AbstractAbstract AbstractSummary PDF
Abstract
The Korea Nurses’ Health Study (KNHS) is an ongoing, large-scale, prospective cohort study of women nurses, focusing on the effects of occupational, environmental, and lifestyle factors on the health of women. The first KNHS survey was performed in 2013-2014 (n=20,613). As of December 2023, 11 follow-up surveys have been conducted. Participants who were pregnant were asked to participate in the early pregnancy survey (n=2,179) and postpartum survey after giving birth (n=2,790). The main variables included socio-demographic, work-related, lifestyle, physical, mental, and women’s health factors. Blood, urine, and toenail samples were collected from a participant subgroup of the first survey (n=1,983). The subgroups of the second survey completed a food frequency questionnaire in 2019 (n=300) and 2021 (n=871). In 2020, a subgroup of the first survey answered a coronavirus disease 2019-related survey (n=975). To examine various health-related factors in young adults, new participants were added to the KNHS cohort in the 11th (n=1,000) and 12th (n=1,002) surveys. The KNHS cohort will help identify health and illness determinants in Korean women. Data can be accessed at https://coda.nih.go.kr/frt/index.do.
Summary
Korean summary
한국간호사건강연구(Korea Nurses’ Health Study, KNHS)는 2013년부터 수행되고 있는 대규모 전향적 추적관찰 코호트 연구이다. 본 연구는 질병력, 약물복용력, 임신력, 여성건강, 정신건강(우울, 스트레스, 피로 등), 생활습관(흡연, 음주, 신체활동, 수면 등), 근무특성을 조사하여 여성건강에 장기적으로 미치는 영향을 파악하고 한국 고유의 여성건강 결정요인을 도출하는 것을 목표로 한다.
Key Message
The Korea Nurses' Health Study (KNHS) is a large-scale, prospective cohort study that has been conducted since 2013. It measures various factors affecting reproductive-aged women, including disease history, medication usage, pregnancy, women's health characteristic, mental health (such as depression, stress, and fatigue), lifestyle characteristic (including smoking, drinking, and physical activity, sleep), and work-related characteristics. The study aims to understand the long-term impact on women's health and identify unique determinants of women's health specific to Korea.
Special Article
Nutrition survey methods and food composition database update of the Korean Genome and Epidemiology Study
Seon-Joo Park, Jieun Lyu, Kyoungho Lee, Hae-Jeung Lee, Hyun-Young Park
Epidemiol Health. 2024;46:e2024042.   Published online April 2, 2024
DOI: https://doi.org/10.4178/epih.e2024042
  • 3,287 View
  • 132 Download
  • 1 Web of Science
  • 1 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
This study presents the nutrition survey methods and the updated food composition database for the Korean Genome and Epidemiology Study (KoGES). The KoGES, which is the largest and longest cohort study in Korea, aims to identify genetic and environmental factors associated with chronic diseases. This study has collected dietary data using a validated semi-quantitative food frequency questionnaire and/or the 24-hour recall method. However, these dietary survey methods use different food composition databases, and their nutritional values are out of date. Therefore, it became necessary to update the food composition database by revising nutrient analysis values to reflect improvements in the performance of food ingredient analysis equipment, revising international values to analysis values of Korean agricultural products, adjusting nutrient units, and adding newly reported nutrients related to chronic diseases. For this purpose, we integrated the different food composition databases used in each nutrition survey, updated 23 nutrients, and expanded 48 new nutrients for 3,648 food items using the latest reliable food composition databases published by national and international institutions. This revised food composition database may help to clarify the relationship between various nutrients and chronic diseases. It could serve as a valuable resource for nutritional, epidemiological, and genomic research and provide a basis for determining public health policies.
Summary
Korean summary
한국인유전체역학조사사업은 우리나라에서 가장 크고 오래된 코호트로 만성질환과 영양과의 관련성을 밝히기 위하여 사용되고 있다. 이 논문에서는 영양조사에 대한 자세한 방법론과 현재 공개하고 있는 23개 영양소의 업데이트 및 48개 새로운 영양소의 확대에 대한 내용을 소개하였다. 이러한 개선을 통해 KoGES 영양 데이터의 활용도가 더욱 높아질 것으로 기대된다.
Key Message
The Korean Genome and Epidemiology Study (KoGES) is the largest and longest-running cohort study in South Korea aimed at identifying the relationship between chronic diseases and nutrient intake. This paper provides a detailed methods of the nutritional surveys and introduces updates to the existing 23 nutrients and the addition of 48 new nutrients. These enhancements are expected to significantly increase the utility of the KoGES nutritional data.

Citations

Citations to this article as recorded by  
  • Serum 25-hydroxyvitamin D levels and risk of all-cause and cause-specific mortality: A 14-year prospective cohort study
    Sihan Song, Jieun Lyu, Bo Mi Song, Joong-Yeon Lim, Hyun-Young Park
    Clinical Nutrition.2024; 43(9): 2156.     CrossRef
Original Article
Folate, vitamin B12, and homocysteine status in the Korean population: data from the 2013-2015 Korea National Health and Nutrition Examination Survey
Sihan Song, Bo Mi Song, Hyun-Young Park
Epidemiol Health. 2024;46:e2024007.   Published online December 11, 2023
DOI: https://doi.org/10.4178/epih.e2024007
  • 6,947 View
  • 192 Download
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
We aimed to assess the serum folate, vitamin B12, and homocysteine status in Korean adolescents and adults using national data.
METHODS
Blood samples were collected from participants aged ≥10 years in the Korea National Health and Nutrition Examination Survey 2013-2015. The stored serum samples were used to measure folate, vitamin B12, and homocysteine concentrations. A total of 8,016 participants were included in this analysis. Unweighted descriptive statistics and adjusted geometric means of the B vitamins and homocysteine concentrations were estimated.
RESULTS
Females had higher serum folate and vitamin B12 concentrations and lower serum homocysteine concentrations than males. Folate deficiency (<6.8 nmol/L) and hyperhomocysteinemia (>15 μmol/L) were found in 8.6% and 11.8% of males, respectively. Approximately 3% of males had low or marginally low vitamin B12 status (≤221 pmol/L). Folate and vitamin B12 deficiencies and hyperhomocysteinemia were found in <2% of females. Suboptimal folate status was prevalent among adolescents and young adults, while suboptimal vitamin B12 status and hyperhomocysteinemia were relatively higher in older adults. Adjusted mean homocysteine concentrations were sharply decreased from the first to second decile of serum folate in males.
CONCLUSIONS
In the Korean population, the proportion of males who achieved desirable folate and homocysteine concentrations were lower than those of females. Although most Koreans have adequate vitamin B12, a suboptimal folate status is common, particularly among adolescents and young adults. These findings could establish a foundation for public health initiatives aimed at improving folate levels in the Korean population.
Summary
Korean summary
엽산과 비타민B12는 전 생애에 걸쳐 건강에 영향을 미치는 필수 비타민이다. 그러나 해당 비타민 상태에 대한 국내 자료는 부족한 실정이다. 본 연구는 국민건강영양조사 참여자로부터 수집된 혈청으로부터 엽산, 비타민B12, 그리고 이들의 기능성 지표인 호모시스테인 농도를 측정하였고 성별과 연령별 분포와 적합 상태를 평가하였다. 엽산 결핍과 고호모시스테인혈증은 남성에서 높은 유병률을 가졌다. 적정 엽산 상태를 충족하지 못하는 비율은 청소년과 젊은 성인에서 흔하게 관찰되었다. 대부분의 한국인은 충분한 비타민B12 수준을 가졌으나, 노인의 경우 정기적인 평가가 필요하다. 본 연구는 한국인이 최적의 엽산과 비타민B12 상태를 유지하기 위한 기반적 근거를 제공한다.
Key Message
Folate and vitamin B12 have significant health impacts throughout the life cycle. However, national-level data on B vitamins in Korea are limited. Serum folate, vitamin B12, and homocysteine concentrations were measured from samples stored during the national survey. In our study, the proportions of folate deficiency and hyperhomocysteinemia were higher in men than in women.Suboptimal folate status was common among adolescents and young adults. Most Koreans had adequate levels of vitamin B12; however, regular monitoring is warranted, especially in the older population. The current data provide a future direction for achieving optimal B vitamin status in the Korean population.
Data Profile
Integrated dataset of the Korean Genome and Epidemiology Study cohort with estimated air pollution data
Hae Dong Woo, Dae Sub Song, Sun Ho Choi, Jae Kyung Park, Kyoungho Lee, Hui-Young Yun, Dae-Ryun Choi, Youn-Seo Koo, Hyun-Young Park
Epidemiol Health. 2022;44:e2022071.   Published online September 7, 2022
DOI: https://doi.org/10.4178/epih.e2022071
  • 8,277 View
  • 249 Download
  • 6 Web of Science
  • 5 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
Public concern about the adverse health effects of air pollution has grown rapidly in Korea, and there has been increasing demand for research on ways to minimize the health effects of air pollution. Integrating large epidemiological data and air pollution exposure levels can provide a data infrastructure for studying ambient air pollution and its health effects. The Korean Genome and Epidemiology Study (KoGES), a large population-based study, has been used in many epidemiological studies of chronic diseases. Therefore, KoGES cohort data were linked to air pollution data as a national resource for air pollution studies. Air pollution data were produced using community multiscale air quality modeling with additional adjustment of monitoring data, satellite-derived aerosol optical depth, normalized difference vegetation index, and meteorological data to increase the accuracy and spatial resolution. The modeled air pollution data were linked to the KoGES cohort based on participants’ geocoded residential addresses in grids of 1 km (particulate matter) or 9 km (gaseous air pollutants and meteorological variables). As the integrated data become available to all researchers, this resource is expected to serve as a useful infrastructure for research on the health effects of air pollution.
Summary
Korean summary
대기오염이 건강에 미치는 정도를 파악하고 이를 최소화하는 과학적 근거 생산 마련을 위하여 한국인유전체역학조사사업(KoGES) 자료와 대기오염 및 기상 자료를 연계하여 연구 기반을 마련하고자 하였다. 배출량, 기상자료 및 공기의 확산 등을 고려하는 화학수송모델(CMAQ)을 통하여 2005년에서 2017년 사이의 대기오염 및 기상자료를 예측하였으며, 이후 관측소 자료 및 인공위성자료인 에어로졸 광화학두께(AOD)를 추가 적용하여 최종 생산하였다. 미세먼지 자료는 1 km 격자로 기체상 오염물질 및 기상 자료는 9 km 격자 단위로 구성되었다. 생산된 자료는 KoGES 참여자의 주소를 기반으로 연계하여 최종 KoGES-대기오염 연계DB를 구축하였으며, 구축된 자료를 이용하여 KoGES 참여자의 대기오염 노출 수준을 공간적 시간적 분포로 살펴보았다. 구축된 자료는 내외부 연구자에게 공개가 되고 있어 대기오염에 의한 건강영향평가 및 피해를 최소화하는 방안 마련 연구를 위한 좋은 기반 자료가 될 것으로 기대된다.
Key Message
The Korean Genome and Epidemiology Study (KoGES) cohort were linked to air pollution data as a national resource for studying air pollution and its health effect. Air pollution data (2005~2017) were produced using community multiscale air quality modeling with additional adjustment of monitoring data, satellite-derived aerosol optical depth, normalized difference vegetation index, and meteorological data to increase the accuracy and spatial resolution. The modelled air pollution data were linked to the cohort based on participants’ geocoded residential addresses in grids of 1 km (particulate matter) or 9 km (gaseous air pollutants and meteorological variables).

Citations

Citations to this article as recorded by  
  • Association between short-term exposure to ambient air pollutants and biomarkers indicative of inflammation and oxidative stress: a cross-sectional study using KoGES-HEXA data
    Ji Hyun Kim, Hae Dong Woo, Jane J Lee, Dae Sub Song, Kyoungho Lee
    Environmental Health and Preventive Medicine.2024; 29: 17.     CrossRef
  • Exposure to ambient air pollution mixture and senescence-associated secretory phenotype proteins among middle-aged and older women
    Eunseon Gwak, Ji-Won Shin, Sun-Young Kim, Jong Tae Lee, Ok Hee Jeon, Seung-Ah Choe
    Environmental Research.2024; 260: 119642.     CrossRef
  • Atrial Fibrillation Identification Using CNNs Based on Genomic Data
    Jaehyung Lee, Oh-Seok Kwon, Gayeon Ryu, Hangsik Shin, Hui-Nam Pak
    Journal of Electrical Engineering & Technology.2024; 19(6): 3645.     CrossRef
  • Edible mushroom intake and risk of all-cause and cause-specific mortality: results from the Korean Genome and Epidemiology Study (KoGES) Cohort
    Hyein Jung, JiAe Shin, Kyungjoon Lim, Sangah Shin
    Food & Function.2023; 14(19): 8829.     CrossRef
  • Association between ambient particulate matter levels and hypertension: results from the Korean Genome and Epidemiology Study
    Sewhan Na, Jong-Tae Park, Seungbeom Kim, Jinwoo Han, Saemi Jung, Kyeongmin Kwak
    Annals of Occupational and Environmental Medicine.2023;[Epub]     CrossRef

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