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Featured researches published by Sang Jun Eun.


International Journal of Health Services | 2011

Struggle against Privatization: A Case History in the Use of Comparative Performance Evaluation of Public Hospitals

Juhwan Oh; Jin-Seok Lee; Yong-Jun Choi; Hyeung-Keun Park; Young Kyung Do; Sang Jun Eun

After the 1997 economic crisis, the South Korean government implemented neoliberal policies in many sectors. In health care, the government attempted to privatize nine public hospitals, framing the initiative as “better management.” In this discourse, public hospital workers were stereotyped as lazy and incompetent, while public hospitals were portrayed as poorly managed and of low quality. However, the government did not present any relevant evidence of improvement in already privatized hospitals, even though three hospitals had been semi-privatized at that time. In this study, the authors evaluated the effects of the semi-privatization, comparing the performance of the semi-privatized hospitals with that of the nine other hospitals targeted for privatization. The study found adverse effects on performance, unlike the claims made by the government. Semi-privatization intensified the workloads of hospital workers and the instability of employment, froze or decreased real wages, and drastically increased hospital revenue per patient stay. The changes may have resulted from redefining profit as the goal of the hospitals, as opposed to the previous focus on decision-making on public health. These research findings played a decisive role in the struggle to keep the targeted public hospitals free of privatization, especially in two of the nine hospitals targeted for privatization in 2001.


PLOS ONE | 2016

Finding the Primary Care Providers in the Specialist-Dominant Primary Care Setting of Korea: A Cluster Analysis

Jin Yong Lee; Sang Jun Eun; Hyun Joo Kim; Min-Woo Jo

Objective This study aimed to identify private clinics that have a potential to perform the role of primary care providers (PCPs) in a primary care setting in Korea where private specialists are dominant. Methods The 2013 National Patient Sample claim data of Health Insurance Review and Assessment Service in Korea was used. Two-step cluster analysis was performed using characteristics of private clinics, and patient and utilization characteristics of 27,797 private clinics. External validation of clusters was performed by assessing the association among clusters and outcomes of care provided by private clinics. Stability of clusters was cross-validated using discriminant analysis. Results The result classified more than a half of private clinics into a potential PCP cluster. These were private clinics with specialties considered to be those of primary care physicians and were more likely to be located in non-metropolitan areas than specialized PCPs were. Compared to specialized PCPs, they had a higher percentage of pediatric and geriatric patients, patients with greater disease severity, a higher percentage of patients with complex comorbidities or with simple or minor disease groups, a higher number of patients and visits, and the same or higher quality of primary care. The most important factor in explaining variations between PCP clusters was the number of simple or minor disease groups per patient. Conclusion This study identified potential PCPs and suggested the identifying criteria for PCPs. It will provide useful information for formulation of a primary care strengthening policy to policy makers in Korea as well as other countries with similar specialist-dominant primary care settings.


Yonsei Medical Journal | 2017

Gender Differences in Factors Related to Prehospital Delay in Patients with ST-Segment Elevation Myocardial Infarction

Hee-Sook Kim; Kun-Sei Lee; Sang Jun Eun; Si-Wan Choi; Dae Hyeok Kim; Tae Ho Park; Kyeong Ho Yun; Dong Heon Yang; Seok Jae Hwang; Ki-Soo Park; Rock Bum Kim

Purpose The aim of our study was to investigate gender differences in factors related to prehospital delay and identify whether the knowledge of acute myocardial infarction symptoms affects this delay in Korean patients with ST-elevation myocardial infarction (STEMI). Materials and Methods A total of 350 patients (286 men, 64 women) with confirmed STEMI were interviewed to investigate socio-demographics, history of disease, symptom onset time, and factors that contributed to delayed decision time in seeking treatment and hospital arrival time from symptom onset. Factors associated with prehospital delay were examined separately by gender using univariate and multivariate analyses. Results Female patients had higher proportions of ≥60-minute decision time and ≥120-minute arrival time compared to male patients (33.9% vs. 23.1%, 60.9% vs. 52.1%, respectively). However, the difference was not statistically significant (p=0.093 and 0.214, respectively). Previous cardiovascular disease (CVD) was associated with increased decision time in men, whereas, in women, lower educational status caused a greater delay in decision time. Factors associated with hospital arrival time excluding delayed decision time were referral from another hospital, previous CVD, and percutaneous coronary intervention in men, and referral from another hospital in women. Conclusion Gender differences exist in factors related to prehospital delay. Therefore, public education to reduce prehospital delay should be conducted according to gender with a focus on the pertinent factors.


Medicine | 2017

Defining the activities of publicness for Koreaʼs public community hospitals using the Delphi method

Kun-Sei Lee; Hyun Joo Kim; Myoungsoon You; Jin-Seok Lee; Sang Jun Eun; Hyoseon Jeong; Hye Mi Ahn; Jin Yong Lee

Abstract This study aims to identify which activities of a public community hospital (PHC) should be included in their definition of publicness and tries to achieve a consensus among experts using the Delphi method. We conduct 2 rounds of the Delphi process with 17 panel members using a developed draft of tentative activities for publicness including 5 main categories covering 27 items. The questions remain the same in both rounds and the applicability of each of the 27 items to publicness is measured on a 9-point scale. If the participants believe government funding is needed, we ask how much they think the government should support each item on a 0% to 100% scale. After conducting 2 rounds of the Delphi process, 22 out of the 27 items reached a consensus as activities defining the publicness of the PHCs. Among the 5 major categories, in category C, activities preventing market failure, all 10 items were considered activities of publicness. Nine of these were evaluated as items that should be compensated at 100% of total financial loss by the Korean government. Throughout results, we were able to define the activities of the PCH that encompassed its publicness and confirm that there are “good deficits” in the context of the PCHs. Thus, some PCH deficits are unavoidable and not wasted as these monies support a necessary role and function in providing public health. The Korean government should therefore consider taking actions such as exempting such “good deficits” or providing additional financial aid to reimburse the PHCs for “good deficits.”


Journal of Dermatology | 2017

High rate of systemic corticosteroid prescription among outpatient visits for psoriasis: A population‐based epidemiological study using the Korean National Health Insurance database

Sang Jun Eun; Sihyeok Jang; Jin Yong Lee; Young Kyung Do; Seong Jin Jo

The use of systemic corticosteroids (SC) for the treatment of psoriasis is not recommended according to textbooks and guidelines. In clinical practise, however, many physicians frequently prescribe SC for patients with psoriasis. To determine the magnitude of SC prescription for outpatients with psoriasis in Korea and identify factors associated with the use of SC, we used the 2010–2014 nationwide claims data of the Health Insurance Review and Assessment Service of Korea. In frequency analysis for the full scale of prescribed SC, oral methylprednisolone was the most frequently prescribed SC, followed by dexamethasone and betamethasone injections. The prescription rate of SC was 26.4% in outpatient visit episodes for psoriasis. The prescription rate of SC was higher in older patients, Medical Aid recipients, patients who visited office‐based physician practices and hospitals, and patients living in non‐metropolitan areas. In multiple logistic regression analyses, the older age group and smaller health‐care institutions were more associated with the SC prescription. In conclusion, SC were widely prescribed for patients with psoriasis in Korea despite the current guidelines. Both patients’ individual and institutional characteristics were associated with the SC prescription.


PLOS ONE | 2016

Determinants of Attitude toward the Public Health Spending and Its Relationship with Voting Behavior in the 2012 South Korean Presidential Election.

Sang Jun Eun; Jin Yong Lee; Hyemin Jung; Jin-Seok Lee

This study aimed to identify the factors influencing South Korean voters’ attitudes towards increasing public expenditure on health and to identify whether the issue of healthcare expenditure influenced candidate choice in the 2012 Korean presidential election. The study used the data from a survey conducted by the Institute of Korean Politics at Seoul National University immediately following the 2012 presidential election. The survey was completed by a nationwide sample of 1,200 people aged 19 or over using a face-to-face interview method and proportional quota sampling based on sex, age, and region. About 44.3% of respondents had a positive attitude toward increasing public health expenditure. There was no significant difference by the candidate they supported (conservative Park Geun-hye or liberal Moon Jae-in). In particular, even 44.9% of conservative supporters agreed with more spending. Politically neutral respondents (OR = 1.76, 90% CI 1.22–2.54) and strong conservative party supporters (OR = 1.53, 90% CI 1.05–2.25) were more likely to support public health expenditure increase compared to strong liberal party supporters. Also, respondents who believed that the economic gap in the country was widening were 1.91 times more likely to support an increase in public health expenditures. However, the issue of health expenditure had no influence on voters’ choice of presidential candidates, and in particular no negative effect of choice of the ruling (conservative) party’s candidate. Our results should be interpreted with care; one possible reason for this lack of effect might be that constituents voted along partisan lines regardless of their attitude to the welfare issue; another possible explanation might be the success of the “left click strategy” of the conservative party. That is, the conservatives did not reject economic democratization or social welfare expansion. Further research should be done to explain why attitudes to health spending did not directly affect choice of candidate.


Journal of Epidemiology and Community Health | 2016

Effects of deregulation of the driving licence application process on road safety in Korea: an interrupted time-series analysis.

Juhwan Oh; Sang Jun Eun; Hee-Sook Kim

Background Road traffic deaths (RTDs) remain the 9th most common cause of mortality in South Korea despite their decreasing trends in high-income countries. In 2010 and 2011, the Korean government deregulated the process for obtaining a driving licence, and there has been significant concern that such deregulation of the driving licence policy could reduce road safety. This study aimed to explore the effects of the deregulation of driving licence policy on road safety by examining the incidence of road traffic collisions (RTCs), road traffic injuries (RTIs) and RTDs. Methods The monthly incidence of RTCs, RTIs and RTDs was generated by using numbers of RTCs, RTIs and RTDs as numerators and numbers of registered vehicles as denominators. Changes in incidence since the deregulation implementation in February 2010 (phase I) and June 2011 (phase II) were evaluated via interrupted time-series analysis. Results The second deregulation phase demonstrated significant changes in numbers of RTCs and RTIs: numbers of RTCs and RTIs decreased until they began to increase in November 2011. Since then, the monthly incidence of RTCs and RTIs have increased by 133.5 and 123.8 per 100 000 vehicles per month, respectively (p<0.05). RTD secular trends began to increase consecutively at rates of 0.024 (June 2010), 0.018 (between July 2010 and June 2011) and 0.273 (July 2011 onward) per 100 000 vehicles per month. Over the entire study period, the RTD incidence rate increased by 0.018 deaths per month on average subsequent to the first deregulation phase (p<0.05). Conclusions The deregulation policies that simplified the driving licence process were associated with increased incidence of RTCs, RTIs and RTDs in Korea.


Health Policy and Management | 2013

Evaluating the Performance of the Emergency Medical Services Index

Sang Jun Eun; Jin-Seok Lee; Yoon Young Kim; Koo Young Jung; Sue K. Park; Jin Yong Lee

Background: In 2006 Emergency Medical Services Index (EMSI), which summarizes the performance of regional emergency medical services system, was developed. This study assesses the performance of the EMSI to help determine whether EMSI can be used as evaluation tool. Methods: To build a composite score of the EMSI from predefined 24 indicators, 3 normalized values were calculated for each indicator, the normalized values of each indicator were weighted using 4 weighting methods, and the weighted values were aggregated into the final composite score using 2 aggregation schemes. The performance of EMSI was evaluated using 3 criteria: discrimination, construct validity, and sensitivity. Discrimination was the proportion of regions that did not include the overall median rank in the 5th to 95th percentiles rank interval, which was calculated from Monte Carlo simulation. Construct validity was a correlation among the alternative EMSIs. Sensitivity of EMSIs was evaluated by total shift of quartile membership and changes of 5th to 95th percentile intervals. Results: The total discrimination performance of the EMSI was 50.0%. Correlation coefficients between EMSIs using standardized values and those using rescaled values ranged from 0.621 to 0.997. Variation of the quartile membership of regions ranged from 0.0% to 75.0%. The total change in the 5th to 95th percentile intervals ranged from -19 to +17 places. Conclusion: The results suggested that the EMSI could be used as a tool for evaluating quality of regional EMS system and for identifying the areas for quality improvement.


Journal of Korean Medical Science | 2014

Evidence of a Broken Healthcare Delivery System in Korea: Unnecessary Hospital Outpatient Utilization among Patients with a Single Chronic Disease Without Complications

Jin Yong Lee; Min-Woo Jo; Weon-Seob Yoo; Hyun Joo Kim; Sang Jun Eun


Medicine | 2018

Symptom clusters and treatment time delay in Korean patients with ST-elevation myocardial infarction on admission

Hee-Sook Kim; Sang Jun Eun; Jin Yong Hwang; Kun-Sei Lee; Sung-il Cho

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Jin Yong Lee

Seoul National University

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Hyun Joo Kim

Seoul National University

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Hee-Sook Kim

Centers for Disease Control and Prevention

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Hyemin Jung

Seoul National University

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Juhwan Oh

Seoul National University

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Young Kyung Do

Seoul National University

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