Publications by authors named "Hoyeon Jang"

Article Synopsis
  • A study analyzed universal health insurance data from South Korea to assess how the incidence of psychiatric disorders changed during the COVID-19 pandemic, comparing it to pre-pandemic rates from 2015-2023.
  • The results showed a decrease in incidences of organic mental disorders and substance-related disorders, while there were significant increases in anxiety disorders, behavioral syndromes, and various developmental and emotional disorders among children and adolescents.
  • The findings suggest that pandemic-related stressors, including lifestyle disruptions and limited access to healthcare, impacted mental health significantly, highlighting the need for further examination of these public health implications.
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Floods can have adverse health effects and impose a burden on healthcare systems. However, the potential consequences of floods on specific medical causes in densely populated metropolitan cities has not been characterized yet. Therefore, we evaluate the changes in healthcare utilization patterns after the 2022 Seoul flood using nationwide health insurance data.

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Article Synopsis
  • A significant fire at a tire manufacturing factory in Daejeon, Korea, lasted for three days starting on March 12, 2023, leading to concerns about health risks from smoke exposure for nearby residents.
  • The study aimed to analyze the health effects and excess air pollution exposure resulting from the fire by using data from local monitoring stations and health records.
  • Results showed that residents in smoke-exposed areas experienced elevated levels of various pollutants and an increase in incidence rates of respiratory and skin conditions following the incident.
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Background: Although the ongoing epidemics of Coronavirus disease 2019 (COVID-19) may have affected the mortality trend of the nation, the national level assessment of excess mortality (changes in overall mortality in the entire population) is still scarce in Korea. Therefore, this study evaluated the excess mortality during the COVID-19 pandemic in Korea using the certified mortality data.

Methods: Monthly mortality and population data from January 2013 to June 2022 was obtained from the National Health Insurance Service database and Statistics Korea.

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Article Synopsis
  • South Korea has declared a return to normalcy as more individuals gain immunity to COVID-19, but ongoing outbreaks continue due to new variants and decreasing immunity levels.
  • Health officials are targeting high-risk groups, particularly those with chronic conditions, to protect public health and the economy.
  • A study revealed that individuals with severe chronic illnesses, like cancer, have vaccination rates 10-20% lower than the general population, highlighting the need for more focused vaccination efforts.
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Article Synopsis
  • The study analyzed data from 2005-2016 on lung cancer surgeries in South Korea to evaluate how hospital selection affects clinical outcomes and trends in surgical procedures.
  • It found that surgery rates are increasing among specific demographics, including women and older patients, suggesting shifts in who receives surgical treatment for lung cancer.
  • The research showed significant survival differences based on hospital selection, indicating that patient preferences for hospitals outside their area of residence (HOR) are rising, but this trend is not consistent across all income groups and older patients.
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Background: Trigeminal neuralgia (TN) is one of the most painful disorder in the orofacial region, and many patients have suffered from this disease. For the effective management of TN, fundamental epidemiologic data related to the target population group are essential. Thus, this study was performed to clarify the epidemiological characteristics of TN in the Korean population.

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Purpose: Ductal carcinoma (DCIS) is common in South Korea. We evaluated the patterns of axillary surgery among patients with DCIS to highlight the need for compliance with the updated national guidelines. We also evaluated whether sentinel lymph node biopsy (SLNB) was performed in accordance with the national guidelines.

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Cervical facet joint (CFJ) syndrome is a common cause of neck pain. For its diagnosis and treatment, CFJ injection with arthrogram is generally performed. This study aimed to investigate the frequency of extra-CFJ flow on CFJ arthrograms during injections and its differences according to age, sex, and cervical vertebral level.

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In this study, red mud (RM), a highly alkaline waste generated from alumina production industries, was used as a catalytic material for both fast copyrolysis of organosolv lignin (OL) and polypropylene (PP) and toluene removal under ozone at room temperature. The RM was pretreated with HCl to investigate the effect of alkalinity. In the catalytic fast copyrolysis of the OL and PP, the acid-treated RM (HRM) produced more aromatics, phenolics, and light olefins (C to C) but less oxygenates and heavy olefins (C to C) than the RM.

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