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Wan Kyoo Jeong

Seoul National University · Medicine

About the Lab

Professor Wan Kyoo Jeong's research lab focuses on health economics and population health, with a strong emphasis on the socioeconomic determinants of health outcomes. The lab investigates how economic resources, such as income and health insurance, influence health indicators including birth outcomes, obesity-related conditions, and chronic disease management. Key research directions include the development and application of novel anthropometric measures like LBSIZ to better assess abdominal obesity and its health implications, as well as evaluating the impact of healthcare workforce and insurance policies on medical utilization and outcomes. The lab employs rigorous econometric methods using large-scale national survey data to inform public health policy and intervention strategies.

health economicsobesity measuressarcopenic obesityhealth insurancebirth outcomes

Research Overview

Papers
66
Total Citations
762
Papers (5y)
20
Primary Field
Medicine

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
20total
2021
2022
2023
2024
2025
Citations per year (5y)
166total
20212022202320242025

Selected Papers

15
1
Article|64 citations·2015
MONEY TRANSFER AND BIRTH WEIGHT: EVIDENCE FROM THE ALASKA PERMANENT FUND DIVIDEND
Wankyo Chung, Hyungserk Ha, Beomsoo Kim
SJR Q1Economic Inquiry

Abstract The positive relationship between income and health is well established. However, the direction of causality remains unclear: do economic resources influence health, or vice versa? Exploiting a new source of exogenous income variation, this study examines the impact of the Alaska Permanent Fund Dividend ( APFD ) on newborns' health outcomes. The results show that income has a significantly positive, but modest effect on birth weight. We find that an additional $1,000 ($2,331 in 2011 dol

Sociology and Political ScienceSocial Sciences
2
Article|40 citations·2018
Liver cirrhosis and cancer: comparison of mortality
Wankyo Chung, Changik Jo, Woo Jin Chung, Dong Joon Kim
SJR Q1Hepatology International
EpidemiologyMedicine
3
Article|35 citations·2016
Association of a New Measure of Obesity with Hypertension and Health-Related Quality of Life
Wankyo Chung, Chun Gun Park, Ohk‐Hyun Ryu
SJR Q1PLoS ONEOA

The LBSIZ is a standard normalized obesity measure independent of weight, height, and BMI. LBSIZ is a new measure of abdominal obesity with the ability to predict hypertension and impaired HRQOL, irrespective of BMI.

Public Health, Environmental and Occupational HealthMedicine
4
Article|27 citations·2019
Utility of the Z-score of log-transformed A Body Shape Index (LBSIZ) in the assessment for sarcopenic obesity and cardiovascular disease risk in the United States
Wankyo Chung, Jung Hwan Park, Hye Soo Chung, Jae Myung Yu, Dong Sun Kim, Shinje Moon
SJR Q1Scientific ReportsOA

Body mass index (BMI) has limited accuracy for predicting cardiovascular diseases (CVD) and is not capable of identifying sarcopenic obesity, the combination of sarcopenia (an age-associated decline in muscle mass and physical function) and obesity. To overcome this, the z-score of the log-transformed A Body Shape Index (LBSIZ) was recently introduced as a measure of obesity using waist circumference, height, and weight. We aimed to investigate the association of LBSIZ with sarcopenic obesity an

PhysiologyMedicine
5
Article|25 citations·2017
The Impact of Nurse Staffing on In-Hospital Mortality of Stroke Patients in Korea
Wankyo Chung, Min Sohn
SJR Q1The Journal of Cardiovascular Nursing

BACKGROUND: Stroke is one of the leading causes of death in Korea, and a well-qualified, adequate nursing force achieves better patient outcomes. STUDY PURPOSES: This study examined the association between nurse staffing and in-hospital mortality among stroke patients in a nationally representative sample. METHODS: This cross-sectional retrospective study was conducted using 2009 National Health Insurance claims data of stroke patients admitted to variously sized Korean hospitals. The data inclu

Research and TheoryNursing
6
Article|23 citations·2023
Effects of private health insurance on medical expenditure and health service utilization in South Korea: a quantile regression analysis
Kristine Namhee Kwon, Wankyo Chung
SJR Q1BMC Health Services ResearchOA

BACKGROUND: Despite universal health insurance, South Korea has seen a sharp increase in the number of people enrolled in supplemental private health insurance (PHI) during the last decade. This study examined how private health insurance enrollment affects medical expenditure and health service utilization. METHODS: Unbalanced panel data for adults aged 19 and older were constructed using the 2016-2018 Korea Health Panel Survey. Quantile regression for medical cost, and quantile count regressio

FinanceEconomics, Econometrics and Finance
7
Review|21 citations·2015
The cost of liver disease in Korea: methodology, data, and evidence
Wankyo Chung
SJR Q1Clinical and Molecular HepatologyOA

The economic burden of liver disease is immense because of the associated high mortality and morbidity, especially among the economically active population. This indicates the need to prioritize the development of appropriate health interventions.

Economics and EconometricsEconomics, Econometrics and Finance
8
Article|16 citations·2003
Fringe Benefits and Inequality in the Labor Market
Wankyo Chung
SJR Q1Economic Inquiry

This study shows that when fringe benefits are accounted for, inequality increases at a point in time and grew faster from 1987 to 1994. Several alternative explanations of the observed discrepancies between wage inequality and compensation inequality are assessed. The evidence is that the disproportionately greater decline in income for less skilled workers is responsible for the greater decline in health insurance coverage, which in turn contributes to greater inequality growth when fringe ben

Economics and EconometricsEconomics, Econometrics and Finance
9
Article|14 citations·2021
Fluoroquinolone and no risk of Achilles-tendinopathy in childhood pneumonia under eight years of age—a nationwide retrospective cohort
Yunsun Kim, Gun Woo Park, Sangyoung Kim, Hui Jeong Moon, Sungho Won, Wankyo Chung, Hyeon‐Jong Yang
SJR Q2Journal of Thoracic DiseaseOA

AT was a rare adverse event of FQ use for childhood pneumonia, particularly under eight years of age. Clinicians could consider using FQs as a second-line option in the treatment of childhood pneumonia when there are no alternative therapeutic options.

EpidemiologyMedicine
10
Article|11 citations·2018
Effectiveness of Z-score of log-transformed A Body Shape Index (LBSIZ) in predicting cardiovascular disease in Korea: the Korean Genome and Epidemiology Study
Shinje Moon, Jung Hwan Park, Ohk‐Hyun Ryu, Wankyo Chung
SJR Q1Scientific ReportsOA

Body mass index (BMI) and waist circumference (WC) have limitations in stratifying cardio-metabolic risks. Another obesity measure, A Body Shape Index (ABSI), has been introduced but its applicability remains limited. To address this, the z-score of the log-transformed ABSI (LBSIZ) was recently developed. This study aimed to examine the ability of LBSIZ, compared to that of WC and BMI, to predict cardiovascular disease (CVD) risk. The study included 8,485 participants aged 40-69 years (mean age

Public Health, Environmental and Occupational HealthMedicine
11
Article|11 citations·2018
Association of Z-Score of the Log-Transformed A Body Shape Index with Cardiovascular Disease in People Who Are Obese but Metabolically Healthy: The Korea National Health and Nutrition Examination Survey 2007-2010
Wankyo Chung, Jung Hwan Park, Ohk‐Hyun Ryu, Jae Myung Yu, Hyung Joon Yoo, Shinje Moon
SJR Q1Journal of Obesity & Metabolic SyndromeOA

LBSIZ had the lowest risk for CVDs in the first tertile of LBSIZ and a linear relationship with all its tertiles in MHO, MUNO, and MUO participants.

Public Health, Environmental and Occupational HealthMedicine
12
Article|10 citations·2013
Is the negative relationship between obesity and bone mineral content greater for older women?
Wankyo Chung, Jong-Seok Lee, Ohk‐Hyun Ryu
SJR Q2Journal of Bone and Mineral Metabolism
Orthopedics and Sports MedicineMedicine
13
Article|9 citations·2020
The association of BMI and physical activity on acetabular dysplasia in children
Wankyo Chung, Suzanne de Vos‐Jakobs, Fernando Rivadeneira, Sita Bierma‐Zeinstra, J.H. Waarsing
SJR Q1Osteoarthritis and CartilageOA
SurgeryMedicine
14
Article|7 citations·2019
The Association between Z-Score of Log-Transformed A Body Shape Index and Cardiovascular Disease in Korea
Wankyo Chung, Jung Hwan Park, Hye Soo Chung, Jae Myung Yu, Shinje Moon, Ji Eun Lee
SJR Q1Diabetes & Metabolism JournalOA

The findings of this study suggest that the LBSIZ might be more strongly associated with CVD risks compared to BMI or WC. These outcomes would be helpful for CVD risk assessment in clinical settings, especially the cut-off value of the LBSIZ suggested in this study.

Public Health, Environmental and Occupational HealthMedicine
15
Book Chapter|4 citations·2015
Korea’s Basic Old-Age Pension and its poverty reduction effects
Wankyo Chung
Edward Elgar Publishing eBooks

Wankyo Chung estimates the poverty reduction effect of the Basic Old-Age Pension (BOAP) in Korea. More specifically, he examines the poverty reduction effects of the direct income transfer through the BOAP to the elderly. Chung begins with an overview of the National Pension Scheme (NPS) and the BOAP. The NPS, initiated in 1988, was expanded to universal coverage in 1999. But by 2009 only about 28 percent of the elderly were recipients, because it had been introduced recently. Due to the low cov

DemographySocial Sciences

Research Areas

Public Health, Environmental and Occupational HealthPhysiologyEconomics and EconometricsSociology and Political ScienceHepatologyGeneral Health Professions

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