Publications by authors named "Sang Bong Ahn"

Background And Aims: Antiviral treatment (AVT) reduces hepatitis B virus (HBV) reactivation and hepatocsellular carcinoma (HCC) development; however, the impact of AVT timing - before versus after HCC diagnosis - on prognosis remains unclear. This study aimed to evaluate the current status, changes, and clinical outcomes of AVT before HCC diagnosis in Korea.

Methods: Data were extracted from the Korean National Health Insurance Service for patients newly diagnosed with HBV-related HCC from 2008 to 2018.

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Background: Metabolic dysfunction is associated with liver disease but it is unclear if it would impact responses to antiviral treatment in chronic hepatitis B (CHB) patients.

Methods: Using data from an international consortium of 4507 treatment-naïve CHB patients who initiated nucleos(t)ide analogues (NAs) between January 2004 and August 2024 from 32 centers and propensity-score matching (PSM) to balance the background of patients with and without metabolic disease (diabetes, obesity, dyslipidemia, or hypertension), we compared their biochemical (BR), virologic (VR), and complete (CR) response.

Findings: More than half (54.

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Aims: Cardiovascular-kidney-metabolic (CKM) syndrome describes the interplay between metabolic dysfunction, chronic kidney disease, and cardiovascular disease. While this framework advances our understanding of interrelated pathophysiology across multiple organ systems, further exploring the liver's role may be beneficial. The fatty liver index (FLI) is a cost-effective indicator of hepatic steatosis; however, its prognostic role in CKM syndrome remains unclear.

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Background & Aims: Time-restricted eating (TRE) may improve weight loss, insulin resistance, and body composition, which are key factors in the pathophysiology of metabolic dysfunction-associated steatotic liver disease (MASLD). However, evidence on the efficacy of TRE in patients with MASLD is limited. This study aimed to evaluate the potential benefits of TRE in patients with overweight or obesity and MASLD.

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Background/aims: Given the increase in prevalence of metabolic diseases, we investigated their long-term impacts on the outcomes of chronic hepatitis B (CHB) patients receiving nucleos(t)ide analogue (NA) treatment.

Methods: We analyzed data from CHB patients for whom initiated NA treatment from 30 centers. We balanced patient characteristics with and without metabolic disease (diabetes, obesity, dyslipidemia, and hypertension) via propensity-score matching (PSM) to evaluate adverse outcomes.

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Background And Aims: This study investigated the long-term prognosis and clinical course of patients who survived for more than 5 years after hepatocellular carcinoma (HCC) diagnosis.

Methods: This retrospective cohort study used data from the Korean National Health Insurance Service database. A total of 35,348 subjects newly diagnosed with HCC between January 2008 and December 2010 were followed up until December 2018.

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Article Synopsis
  • - An online educational program was implemented for 869 physicians, including primary care physicians (PCPs), to improve their management of metabolic dysfunction-associated steatotic liver disease (MASLD).
  • - Initial surveys showed that many PCPs were not routinely assessing liver fibrosis and relied on elevated liver enzyme levels for evaluations, with barriers such as lack of patient education fees and short consultation times.
  • - After the 7-week program, there was an increase in noninvasive liver fibrosis assessments and cardiovascular evaluations, while unnecessary referrals to specialists decreased, highlighting the importance of education in managing MASLD effectively.
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Article Synopsis
  • The study aimed to evaluate the effectiveness and tolerability of direct-acting antiviral (DAA) treatments for hepatitis C virus (HCV) across different genotypes (GTs) in a global, real-world context, focusing particularly on GT3 and GT6.
  • Researchers analyzed data from 15,849 chronic hepatitis C patients across Asia, North America, and Europe over a seven-year period, noting demographic factors such as age, sex, and prior treatment history.
  • Results showed a high sustained virological response (SVR12) rate of 96.9% overall, with variances by genotype, highlighting that independent factors like advanced age, cirrhosis, and previous treatment failures affected treatment outcomes, while being
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Article Synopsis
  • Non-invasive tests (NITs) like FIB-4 and NAFLD fibrosis score (NFS) are useful for diagnosing liver fibrosis in patients with metabolic dysfunction-associated steatotic liver disease (MASLD), but their effectiveness is lower in those with alcohol-related liver disease (MetALD).
  • A study involving 7,918 participants found that the prevalence of MetALD was 5.8%, and those with MetALD had similar metabolic profiles and fibrosis levels compared to MASLD patients.
  • The study concluded that FIB-4 is effective for screening advanced hepatic fibrosis in MetALD, showing good sensitivity and high negative predictive values, making it a reliable option for initial assessments.
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  • Childhood obesity is linked to a rising prevalence of nonalcoholic fatty liver disease (NAFLD) in kids and teens, yet systematic studies on this issue are scarce.
  • A comprehensive search of multiple databases yielded 62 relevant studies for analysis, revealing that NAFLD affects 13% of the general pediatric population and 47% of obese kids.
  • The study found significant gender differences in prevalence, with higher rates in males than females for both general and obese populations, highlighting the urgent need for more epidemiological research on NAFLD in pediatrics.
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Background And Aim: The benefits of entecavir (ETV) versus tenofovir disoproxil fumarate (TDF) in reducing the development of chronic hepatitis B (CHB)-related hepatocellular carcinoma remain controversial. Whether mortality rates differ between patients with CHB treated with ETV and those treated with TDF is unclear.

Methods: A total of 2542 patients with CHB treated with either ETV or TDF were recruited from a multinational cohort.

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Backgruound: This study evaluated the usefulness of indices for metabolic syndrome, non-alcoholic fatty liver disease (NAFLD), and insulin resistance (IR), as predictive tools for cardiovascular disease in middle-aged Korean adults.

Methods: The prospective data obtained from the Ansan-Ansung cohort database, excluding patients with major adverse cardiac and cerebrovascular events (MACCE). The primary outcome was the incidence of MACCE during the follow-up period.

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Although coffee has a potential hepatoprotective effect, evidence of the relationship between coffee consumption and metabolic dysfunction-associated steatotic liver disease (MASLD) remains conflicting. There is limited evidence regarding the most appropriate coffee intake to prevent advanced liver fibrosis (ALF) in patients with MASLD. We investigated the effect of coffee consumption on MASLD and ALF among 5266 participants without MASLD and 1326 with MASLD but without ALF.

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Guidelines vary on alpha-fetoprotein (AFP) testing for hepatocellular carcinoma (HCC) screening. This study aims to reassess AFP's role in HCC surveillance, utilizing a comprehensive, recent, nationwide cohort. Utilizing the National Health Claims Database from the Korean National Health Insurance Service, this research included data from 185,316 HCC patients registered between 2008 and 2018.

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Article Synopsis
  • - Elevated serum gamma-glutamyl transferase (GGT) levels are linked to higher mortality rates in chronic hepatitis B (CHB) patients receiving nucleotide/nucleoside analog treatments, showing significant increases in GGT measurements before and six months after treatment.
  • - A study analyzing 2,843 CHB patients found that factors such as cirrhosis, age, and pretreatment GGT levels are strong predictors of both all-cause and liver-related mortality, with cirrhosis having the highest hazard ratio.
  • - The link between pretreatment GGT levels and mortality remains consistent regardless of alcohol use history, and there is a noticeable dose-dependent association with different percentiles of GGT indicating increased mortality risk
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Background: Data on patients switched to tenofovir alafenamide (TAF) from nucleos(t)ide analogues (NUCs) other than tenofovir disoproxil fumarate are limited.

Aims: To assess the treatment and renal/bone safety outcomes following the switch to TAF.

Methods: We prospectively enrolled adult patients with chronic hepatitis B (CHB) who switched from any NUC to TAF at 14 centres in Japan, Korea, Taiwan and the U.

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Background & Aims: It is unclear if there may be sex differences in response to nucleos(t)ide analogs including virologic response (VR), biochemical response (BR), complete response (CR), and hepatocellular carcinoma (HCC) incidence among hepatitis B patients. We compared nucleos(t)ide analog treatment outcomes by sex.

Methods: We performed a retrospective cohort study of 3388 treatment-naïve adult hepatitis B patients (1250 female, 2138 male) from the Real-World Evidence from the Global Alliance for the Study of Hepatitis B Virus consortium who initiated therapy with either entecavir or tenofovir from 22 sites (Argentina, Korea, Japan, Taiwan, and the United States).

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Article Synopsis
  • Non-alcoholic fatty liver disease (NAFLD) is often found out when people check for other health issues, and many people know about it.
  • A study showed that while most people know about NAFLD, they don't realize it can lead to serious heart problems and liver damage.
  • Many people who are diagnosed with NAFLD didn't get proper information and didn't visit a clinic for care, and the reasons for this differ between men and women, and also by age.
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Normalization of serum alanine aminotransferase (ALT) levels is one of the goals of hepatitis B treatment. However, ALT levels in cirrhosis patients might be normal or mildly elevated regardless of ongoing inflammation. Therefore, we examined whether on-treatment ALT and other potential on-treatment indicators could be clinical surrogates of antiviral therapy in HBV-related cirrhosis.

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Introduction: Tenofovir disoproxil fumarate (TDF) is reportedly superior or at least comparable to entecavir (ETV) for the prevention of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B; however, it has distinct long-term renal and bone toxicities. This study aimed to develop and validate a machine learning model (designated as Prediction of Liver cancer using Artificial intelligence-driven model for Network-antiviral Selection for hepatitis B [PLAN-S]) to predict an individualized risk of HCC during ETV or TDF therapy.

Methods: This multinational study included 13,970 patients with chronic hepatitis B.

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Nonalcoholic fatty liver disease (NAFLD) affects approximately 30% of the population worldwide and includes nonalcoholic fatty liver, nonalcoholic steatohepatitis (NASH), and cirrhosis. Since NAFLD-associated diseases begin with steatosis, the early diagnosis of steatosis helps to prevent the progression of NASH and fibrosis. In addition, more convenient and easily diagnosable serum biomarkers are becoming crucial in disease diagnosis.

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Background: The global burden of nonalcoholic fatty liver disease (NAFLD) is rapidly increasing.

Aims: This study aimed to evaluate the effect of exercise on intrahepatic lipid (IHL), serum alanine aminotransferase (ALT), body mass index (BMI), and insulin resistance in NAFLD patients.

Methods: We searched MEDLINE, Embase, Cochrane CENTRAL, KMbase, and the Korean Studies Information Service System through April 2022.

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Hepatitis B (HBV) reactivation was observed to be more than 10% in patients receiving interferon-based therapy for hepatitis C (HCV) co-infection. At present, when direct-acting antiviral (DAA) has become the main treatment for HCV, there are few large-scale studies on the reactivation of HBV in these population. We studied HBV reactivation risk and prophylactic HBV treatment efficacy in HBV/HCV co-infected patients receiving DAA therapy.

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