Publications by authors named "Chang W Kim"

Early diagnosis and timely initiation of treatment plans for diabetes are crucial for ensuring individuals' well-being. Emerging technologies like artificial intelligence (AI) and computer vision are highly regarded for their ability to enhance the accessibility of large datasets for dynamic training and deliver efficient real-time intelligent technologies and predictable models. The application of AI and computer vision techniques to enhance the analysis of clinical data is referred to as eHealth solutions that employ advanced approaches to aid medical applications.

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Introduction And Objectives: The short-term mortality of severe alcoholic hepatitis (SAH) is high, but there are no effective treatments to improve short-term mortality other than corticosteroids. This study investigated the effects of adding rifaximin to standard treatment in patients with SAH.

Material And Methods: In this randomized controlled open-label trial, patients with SAH (Maddrey's discriminant function≥32) were randomized to the rifaximin or control group.

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  • - The study explores the necessity of chest tube insertion before surgery for primary spontaneous pneumothorax (PSP) in young patients, finding it may not be needed.
  • - Researchers analyzed records of 128 patients aged 14-30 who underwent video-assisted thoracoscopic surgery (VATS) and compared outcomes between those who had chest tubes and those who didn’t.
  • - Results showed no major differences in complication rates or recovery between the two groups, but the non-chest tube group enjoyed a shorter hospital stay and a higher rate of single-port surgeries.
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  • Drug-resistant microorganisms are a major public health issue as they diminish the effectiveness of antibiotics and increase health risks from free radicals.
  • A study focused on a tropical evergreen tree from the Ebenaceae family, utilizing its stem and leaves, aimed to identify bioactive compounds and assess their antimicrobial and antioxidant properties using Gas Chromatography-Mass Spectrometry (GC-MS).
  • The study discovered 14 bioactive compounds, with methanolic leaf extracts showing strong antibacterial activity and stem extracts demonstrating significant antioxidant potential, highlighting the tree's potential as a natural remedy against drug resistance and oxidative stress.
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Introduction: Noninvasive stool DNA-based methylation testing has emerged as an effective strategy for the early colorectal cancer (CRC) detection. Syndecan-2 (SDC2) methylation frequently occurs in all stages of CRC; therefore, the aim of this study was to evaluate the clinical performance of a stool DNA-based SDC2 methylation test for detecting CRC in asymptomatic or high-risk CRC populations.

Methods: This multicenter prospective study was conducted to determine the clinical performance of the SDC2 methylation test on stool DNA using real-time polymerase chain reaction.

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Introduction: Os-odontoideum is a rare condition described radiographically and clinically as a congenital anomaly of the second cervical vertebra (axis). It is a smooth, independent ossicle of variable size and shape separated from the base of a shortened odontoid process by an obvious gap, with no osseous connection to the body of C2.

Materials And Methods: This study reviewed the literature on OO to evaluate its etiology, clinical presentations, differential diagnosis, imaging modalities, and outcomes in the management of asymptomatic and symptomatic cases of Os Odontoideum.

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  • Genomic alterations in tumors significantly influence cancer progression and treatment response, with whole-genome sequencing (WGS) emerging as a viable alternative to traditional targeted panel sequencing (TPS) due to advancements in cost and technology.
  • A study involving 120 cancer patients evaluated the clinical utility of WGS and found that 79% received genomic reports quickly, with 72% of these reports offering clinically relevant information.
  • The insights gained from WGS helped in selecting tailored treatments and clinical trials based on identifying specific mutations, potentially enhancing precision oncology and suggesting routine integration of WGS in cancer management.
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Introduction: Despite the emergence of atezolizumab and bevacizumab (A + B) as standard first-line systemic therapy for unresectable hepatocellular carcinoma (HCC), a comprehensive understanding of the clinical significance of immune-related adverse events (irAEs) remains limited. We aimed to assess the impact of irAEs on patients with HCC undergoing A + B treatment.

Methods: This multicentre retrospective study included consecutive patients with HCC who were treated with the A + B regimen from September 2020 to December 2022.

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  • The study explores the relationship between masticatory difficulty (trouble chewing) and chronic cough using data from the Korean National Health and Nutrition Examination Survey from 2011-2015.
  • Findings show that individuals with masticatory difficulty have a higher prevalence of chronic cough (4.8%) compared to those without such difficulty (3.0%).
  • The researchers suggest that masticatory difficulty could be a clinical indicator for chronic cough, highlighting the need for collaboration between dental and respiratory health professionals for better patient care and further research into related health issues.
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Background/aims: Bile duct invasion (BDI) is rarely observed in patients with advanced hepatocellular carcinoma (HCC), leading to hyperbilirubinemia. However, the efficacy of pretreatment biliary drainage for HCC patients with BDI and obstructive jaundice is currently unclear. Thus, the aim of this study was to assess the effect of biliary drainage on the prognosis of these patients.

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We present the design, synthesis, and evaluation of novel metal-free photosensitizers based on D-π-A structures featuring tri-arylamine as an electron donor, cyanoacrylic acid as an anchoring group, and substituted derivative π-bridges including 9,9-dimethyl-9H-fluorene, benzo[]thiophene, or naphtho [1,2-:4,3-']dithiophene. The aim of the current research is to unravel the relationship between chemical structure and photovoltaic performance in solar cell applications by investigating the properties of these organic sensitizers. The newly developed photosensitizers displayed variations in HOMO-LUMO energy gaps and photovoltaic performances due to their distinct π-bridge structures and exhibited diverse spectral responses ranging from 343 to 490 nm.

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Objective: We aimed to investigate the changes in aorta size, the factors affecting size changes in patients with acute blunt traumatic aortic injury and to evaluate the adequacy of the current 120% thoracic endovascular aortic repair graft oversizing policy.

Design And Methods: This retrospective review study was conducted using the prospectively collected medical records of 45 patients (mean age: 53.5 years, male: 39 patients) with blunt traumatic aortic injury treated at a level 1 trauma center between 2012 and 2021.

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: Previous studies have reported controversial results on the association between gout and the risk of cancer. This study aimed to investigate the relationship between gout and the incidence of head and neck cancer (HNC). : The data of participants who underwent health checkups in 2009 were analyzed using the National Health Insurance Database in South Korea.

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  • - This study aimed to investigate how the time between bowel cleansing completion and colonoscopy affects the quality of bowel preparation, as previous studies suggested shorter intervals might be better, but no RCT had directly tested this.
  • - Participants were divided into two groups based on completion times: 2-4 hours and 4-8 hours before the colonoscopy, with success measured using the Boston Bowel Preparation Scale (BBPS).
  • - Results showed the 2-4 hour group had similar overall bowel cleansing success (97.6%) to the 4-8 hour group (95.2%), but significantly more participants achieved perfect cleansing in the shorter interval group (56.5% vs. 39.8%).
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We present a general and practical theoretical framework to investigate how energy is dissipated in open quantum system dynamics. This is performed by quantifying the contributions of individual bath components to the overall dissipation of the system. The framework is based on the Nakajima-Zwanzig projection operator technique, which allows us to express the rate of energy dissipation into a specific bath degree of freedom by using traces of operator products.

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Objective: To evaluate the safety and clinical outcomes of the Passeo-18 Lux drug-coated balloon (DCB) in endovascular revascularization procedures under real-world conditions in a Korean population with atherosclerotic disease of the infrainguinal arteries, including below-the-knee (BTK) arteries.

Materials And Methods: Eight institutions in the Republic of Korea participated in this prospective, multicenter, single-arm, post-market surveillance study. Two hundred patients with Rutherford class 2-5 peripheral arterial disease and infrainguinal lesions suitable for endovascular treatment were competitively enrolled.

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Background And Aim: Our study evaluated the outcomes of switching from tenofovir disoproxil fumarate (TDF) to tenofovir alafenamide (TAF) in patients with chronic hepatitis B (CHB). We assessed viral and biochemical responses as well as changes in the estimated glomerular filtration rate (eGFR) and bone mineral density (BMD).

Methods: This retrospective multicenter study included CHB patients who achieved virologic response (VR) (HBV DNA < 20 IU/mL) while on TDF and were subsequently switched to TAF between April 2018 and October 2021.

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  • This study investigates the link between chronic periodontitis (CP) and the occurrences of deep neck infections (DNI) and peritonsillar abscesses (PTA) using a large national health dataset from Korea spanning 2002-2019.
  • In the analysis, they found no significant relationship between a history of CP and PTA incidence, while CP was significantly associated with a higher incidence of DNI (odds ratio of 1.55).
  • The higher risk of DNI related to CP was particularly noted in younger, male, low-income, and rural demographic groups, indicating the need for better management of CP patients to prevent potential DNI complications.
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Importance: Surgical site infections (SSIs) are prevalent hospital-acquired infections with significant patient impacts and global health care burdens. The World Health Organization recommends using wound protector devices in abdominal surgery as a preventive measure to lower the risk of SSIs despite limited evidence.

Objective: To examine the efficacy of a dual-ring, plastic wound protector in lowering the SSI rate in open gastrointestinal (GI) surgery irrespective of intra-abdominal contamination levels.

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Purpose: Given its heterogeneity and diverse clinical outcomes, precise subclassification of Barcelona Clinic Liver Cancer stage C (BCLC-C) hepatocellular carcinoma (HCC) is required for appropriately determining patient prognosis and selecting treatment.

Experimental Design: We recruited 2,626 patients with BCLC-C HCC from multiple centers, comprising training/test (n = 1,693) and validation cohorts (n = 933). The XGBoost model was chosen for maximum performance among the machine learning (ML) models.

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Introduction: Extraforaminal stenosis in L5-S1, or far-out syndrome (FOS), is defined as L5 nerve compression by the transverse process (TP) of the L5 and the ala of the sacrum and disc bulging with/without osteophytes and/or the thickened lumbosacral and extraforaminal ligament. This study aims to describe the unilateral biportal endoscopic decompression technique of the extraforaminal stenosis at L5-S1 or far out syndrome and evaluate its clinical results with a literature review.

Case Report: A 44-year-old male presented with severe right sharp shooting pain in the buttock, thigh, leg, foot, and/or toes with numbness in the foot and toes (Visual Analog Scale [VAS] 8/10) for six months with an Oswestry disability index (ODI) score of 70%.

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Introduction: Patients with hematological diseases experience complications related to portal hypertension, including life-threatening complications such as variceal bleeding.

Methods: We analyzed the prognosis of patients with hematological diseases and portal hypertension treated with transjugular intrahepatic portosystemic shunts (TIPS) or portal vein stents. We retrospectively assessed patients with hematological diseases and portal hypertension who had variceal bleeding.

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Background: Atezolizumab+bevacizumab (AB) and lenvatinib have been proposed as first-line treatment options for patients with advanced hepatocellular carcinoma (HCC), but comparative efficacy and associated factors are controversial.

Materials And Methods: This real-world multicenter study analysed patients with HCC who received AB (n=169) or lenvatinib (n=177).

Results: First, 1:1 propensity score matching (PSM) was performed, resulting in 141 patients in both the AB and lenvatinib groups.

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