Publications by authors named "Joo H"

In the United States, typhoid vaccination is recommended for international travelers to areas with a recognized risk of typhoid exposure. Using MarketScan® Commercial Database from 2016 through 2022, we estimated typhoid vaccination costs by route (injectable vs. oral) and provider setting (clinic vs.

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Background: Cataract surgery is the most common surgical procedure performed for older US adults. Cataracts are associated with poor cognition and higher rates of dementia, but whether cataract surgery improves cognition for US older adults is not known. We examined the relationship between cataract surgery and long-term change in cognition in the Health and Retirement Study, a population-based study of older US adults linked with Medicare billing data.

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Background: People with diabetes often have increased blood pressure (BP) variability because of autonomic dysfunction and arterial stiffness, making it a critical factor in predicting clinical outcomes. We investigated the reproducibility of long-term visit-to-visit BP variability (VVV) and the minimum number of BP readings to reliably determine VVV in people with diabetes.

Methods: This multicenter retrospective study used data from electronic health records of the Korea University Medical Center database.

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This study examines the impact of older adults' Internet use on care hours and its influence on estimating national cost savings with active and potential Internet users. Using data from the 2015 National Health and Aging Trends Study ( = 1,806), we employed a survey weighted two-part model with gamma distribution. The cost savings were estimated by a replacement approach.

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Background: Acute heart failure (AHF) poses significant diagnostic challenges in the emergency room (ER) because of its varied clinical presentation and limitations of traditional diagnostic methods. This study aimed to develop and evaluate a deep-learning model using electrocardiogram (ECG) data to enhance AHF identification in the ER.

Methods: In this retrospective cohort study, we analyzed the ECG data of 19,285 patients who visited ERs of three hospitals between 2016 and 2020; 9,119 with available left ventricular ejection fraction and N-terminal prohormone of brain natriuretic peptide level data and who were diagnosed with AHF were included in the study.

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Semantic processing is an essential mechanism in human language comprehension and has profound implications for speech brain-computer interface technologies. Despite recent advances in brain imaging techniques and data analysis algorithms, the mechanisms underlying human brain semantic representations remain a topic of debate, specifically whether this occurs through the activation of selectively separated cortical regions or via a network of distributed and overlapping regions. This study investigates spatiotemporal neural representation during the perception of semantic words related to faces, numbers, and animals using electroencephalography.

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Hair follicle cells reside within a complex extracellular matrix (ECM) environment in vivo, where physical and chemical cues regulate their behavior. The ECM is crucial for hair follicle development and regeneration, particularly through epithelial-mesenchymal interactions. Current in vitro models often fail to replicate this complexity, leading to inconsistencies in evaluating hair loss treatments.

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Article Synopsis
  • High-intensity statin therapy is effective in reducing mortality and cardiovascular events in patients with atherosclerotic cardiovascular disease (ASCVD), but elderly patients often tolerate moderate-intensity statins better due to intolerance risks.
  • A study compared the incidence of statin-associated muscle symptoms (SAMS) and low-density lipoprotein cholesterol (LDL-C) levels in elderly ASCVD patients on either high-intensity statins or moderate-intensity statins combined with ezetimibe.
  • Results showed that combination therapy significantly reduced SAMS (0.7% vs 5.7%) while achieving comparable LDL-C target levels (75.4% vs 68.7%), indicating that moderate-intensity therapy with ezetim
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  • Existing computerized cognitive tests (CCTs) often do not include speech recognition, which restricts their ability to evaluate language function; hence, CogMo was developed to incorporate automatic speech recognition for comprehensive cognitive assessment.
  • This study tested the validity and reliability of CogMo in differentiating cognitive impairments among 100 participants, revealing strong correlations between CogMo and the mini-mental state examination (MMSE) scores.
  • Results showed high reliability with an intraclass correlation coefficient of 0.94, and CogMo proved effective in identifying cognitive impairments with a sensitivity of 90% and specificity of 82.9%.
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Objective: To evaluate the audiologic outcomes after cochlear implantation (CI) in prelingually deaf children with comorbid disorders.

Study Design: Retrospective study.

Setting: Tertiary care academic center.

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Article Synopsis
  • Optimizing the educational experience in otologic surgery is crucial due to the complexities of ear anatomy and challenges in video quality during surgical viewings.* -
  • The study aimed to enhance the quality of tympanomastoidectomy surgical videos using AI techniques and assessed their effectiveness through trainee feedback.* -
  • Results indicated that AI-enhanced videos significantly aided trainees in understanding procedures, especially for those with less experience, making surgical education more effective.*
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  • Muscle atrophy is a significant health issue characterized by loss of muscle mass and function, and the study investigates the effects of fingerroot extract (BPE) as a potential solution.
  • BPE, standardized to contain panduratin A, demonstrated significant benefits in restoring muscle mass, strength, and endurance in a mouse model induced with muscle atrophy by dexamethasone.
  • The extract works by reducing inflammation, enhancing antioxidant activity, stimulating protein synthesis through specific signaling pathways, and inhibiting muscle degradation processes, suggesting its potential role in combating muscle wasting diseases.
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Brightening dark excitons in transition metal dichalcogenide monolayers (MLs) can provide large-area ultrathin devices for applications in quantum information science and optoelectronics. For practical applications of dark excitons, a robust and bright emission over a wide area at room temperature is desirable; however, no reliable approach has been demonstrated thus far. In this study, an efficient approach is presented for brightening dark excitons at room temperature over a large area of a WSe ML via coupling between plasmons and dark excitons.

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Background: Lercanidipine, a newer-generation calcium channel blocker, is recognized for its effective antihypertensive properties and reduced side effects. This study aims to compare the effectiveness of lercanidipine and amlodipine in preventing major adverse cardiovascular events (MACE) in hypertensive patients.

Methods: A multicenter, retrospective observational study was conducted using the electronic medical records database from 3 tertiary hospitals in South Korea between 2017 and 2021.

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  • Sepsis is a serious medical condition, and despite numerous clinical trials, finding effective treatment strategies is difficult due to small-scale testing; this study aims to extract optimal treatments from existing patient records.
  • Using a modified deep reinforcement learning algorithm, researchers developed an AI model trained on over 16,000 hospital admissions, with performance tested through various statistical analyses and visualizations.
  • The model showed a significant increase in estimated survival rates (up to 10.03%) and exhibited different treatment strategies compared to physicians, highlighting key factors like blood urea nitrogen and age, and indicating that while promising, results may need further clinical testing before implementation.
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Backgruound: The role of apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) in adipose tissue remains poorly understood. This study investigates adipose tissue dysfunction in heterozygous APE1/Ref-1 deficiency (APE1/Ref-1+/-) mice, focusing on changes in adipocyte physiology, oxidative stress, adipokine regulation, and adipose tissue distribution.

Methods: APE1/Ref-1 mRNA and protein levels in white adipose tissue (WAT) were measured in APE1/Ref-1+/- mice, compared to their wild-type (APE1/Ref-1+/+) controls.

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Calcium channel blockers (CCBs) are frequently co-administered with clopidogrel in cardiovascular disease. Although an inhibitory drug interaction exists between them, comprehensive large-scale studies for its validation are lacking. We investigated interactions between CCBs and clopidogrel using a large-scale national registry of patients who underwent percutaneous coronary intervention (PCI).

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Controlling electron density in two-dimensional semiconductors is crucial for both comprehensive understanding of fundamental material properties and their technological applications. However, conventional electrostatic doping methods exhibit limitations, particularly in addressing electric field-induced drift and subsequent diffusion of electrons, which restrict nanoscale doping. Here, we present a tip-induced nanospectroscopic electric pulse modulator to dynamically control nanoscale electron density, thereby facilitating precise measurement of nano-optoelectronic behaviors within a MoS monolayer.

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Lactic acid bacteria are known to have various effects on the immune system. The type and extent of the effect differ, depending on the type of lactic acid bacteria. This study aimed to investigate the effects of Lactobacillus johnsonii bacterin on mouse-derived immune cells.

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Cochlear implant (CI) users face the decision of whether to upgrade to a new sound processor (SP) with technological advances. We wanted to assess the changes of speech perception ability and aided hearing thresholds as well as subjective satisfaction after upgrade to a new SP. Fifty-five patients who have used CI for 10 years or more and upgraded to a new SP were enrolled.

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Background: Older adults often require surgical care and are at elevated risk of delirium. We explored delirium risk profiles across the population of U.S.

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Background: Despite the proven effectiveness of oral antivirals against severe acute respiratory syndrome coronavirus 2 in randomized trials, their clinical reevaluation is vital in the context of widespread immunity and milder prevalent variants. This study aimed to assess the effectiveness of oral antivirals for coronavirus disease 2019 (COVID-19).

Methods: This retrospective cohort study utilized a target trial emulation framework to analyze patients with COVID-19 aged 60+ from January to December 2022.

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Widespread public awareness is needed to address health disparities and push for effective and equitable solutions. However, in a high choice media environment, this can only be achieved to the extent that people opt to consume disparity messaging. Drawing on theories of selective exposure, the present research uses a pre-registered online study conducted with U.

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