Publications by authors named "Kevin Chin"

Article Synopsis
  • Persistent sex disparities in physical activity and sports participation among US children and adolescents could benefit from interventions aimed at reducing these gaps.
  • A simulation study modeled the potential lifetime impacts of increasing female participants' activity levels to match male levels, examining health and economic outcomes based on the agent-based model of 8,299,353 children aged 6 to 17 in 2023.
  • Results indicated that eliminating these disparities could prevent over 28,000 cases of overweight and obesity by age 18, potentially saving approximately $780 million in combined medical costs and productivity losses over the lifetimes of the affected cohorts.
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Importance: Current guidance to furlough health care staff with mild COVID-19 illness may prevent the spread of COVID-19 but may worsen nursing home staffing shortages as well as health outcomes that are unrelated to COVID-19.

Objective: To compare COVID-19-related with non-COVID-19-related harms associated with allowing staff who are mildly ill with COVID-19 to work while masked.

Design, Setting, And Participants: This modeling study, conducted from November 2023 to June 2024, used an agent-based model representing a 100-bed nursing home and its residents, staff, and their interactions; care tasks; and resident and staff health outcomes to simulate the impact of different COVID-19 furlough policies over 1 postpandemic year.

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Over the past sixty years, scientists have been warning about climate change and its impacts on human health, but evidence suggests that many may not be heeding these concerns. This raises the question of whether new communication approaches are needed to overcome the unique challenges of communicating what people can do to slow or reverse climate change. To better elucidate the challenges of communicating about the links between human activity, climate change and its effects, and identify potential solutions, we developed a systems map of the factors and processes involved based on systems mapping sessions with climate change and communication experts.

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Article Synopsis
  • With COVID-19 vaccinations becoming optional for many organizations, individuals now have the choice to receive new booster shots or updated vaccines.
  • A Markov model was created to analyze the clinical and economic outcomes for individuals in the U.S. regarding annual COVID-19 vaccinations versus not getting vaccinated.
  • For individuals aged 18-49, getting vaccinated could save up to $603 if uninsured, while those aged 50-64 could save even more, with both groups benefiting from vaccination under certain conditions of infection risk and vaccine efficacy.
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Background: With efforts underway to develop a universal coronavirus vaccine, otherwise known as a pan-coronavirus vaccine, this is the time to offer potential funders, researchers, and manufacturers guidance on the potential value of such a vaccine and how this value may change with differing vaccine and vaccination characteristics.

Methods: Using a computational model representing the United States (U.S.

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Importance: There are considerable socioeconomic status (SES) disparities in youth physical activity (PA) levels. For example, studies show that lower-SES youth are less active, have lower participation in organized sports and physical education classes, and have more limited access to PA equipment.

Objective: To determine the potential public health and economic effects of eliminating disparities in PA levels among US youth SES groups.

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Objectives: To evaluate the epidemiologic, clinical, and economic value of an annual nursing home (NH) COVID-19 vaccine campaign and the impact of when vaccination starts.

Design: Agent-based model representing a typical NH.

Setting And Participants: NH residents and staff.

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Introduction: Healthy People 2030, a U.S. government health initiative, has indicated that increasing youth sports participation to 63.

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Objective: Nursing home residents may be particularly vulnerable to coronavirus disease 2019 (COVID-19). Therefore, a question is when and how often nursing homes should test staff for COVID-19 and how this may change as severe acute respiratory coronavirus virus 2 (SARS-CoV-2) evolves.

Design: We developed an agent-based model representing a typical nursing home, COVID-19 spread, and its health and economic outcomes to determine the clinical and economic value of various screening and isolation strategies and how it may change under various circumstances.

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A major challenge in communicating health-related information is the involvement of multiple complex systems from the creation of the information to the sources and channels of dispersion to the information users themselves. To date, public health communications approaches have often not adequately accounted for the complexities of these systems to the degree necessary to have maximum impact. The virality of COVID-19 misinformation and disinformation has brought to light the need to consider these system complexities more extensively.

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Objectives: This study assessed the ability of end-tidal carbon dioxide (ETCO ) in predicting in-hospital mortality and intensive care unit (ICU) admission compared to standard vital signs at ED triage as well as comparing to measures of metabolic acidosis.

Methods: This prospective study enrolled adult patients presenting to the ED of a tertiary care Level I trauma center over 30 months. Patients had standard vital signs measured along with exhaled ETCO at triage.

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Background: Leaks of the esophagus and stomach are difficult to manage and associated with significant morbidity and mortality. Endoscopic therapy can manage these leaks without surgical intervention. Our goal is to create a scoring tool to aid in predicting the success of endoscopic therapy in these patients.

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Article Synopsis
  • Many schools are cutting physical education (PE) classes due to budget issues, raising the question of whether they should be mandatory to combat rising obesity rates among youth.
  • A study using a model of youth in Mexico City found that offering PE classes, even if they don't meet guidelines, can lead to a decrease in obesity rates and is cost-effective over time.
  • If all schools offered PE that met international guidelines, there would be even greater reductions in obesity and related health conditions, potentially saving millions in medical costs while being cost-effective even at higher overall expenses.
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Data for avelumab (anti-PD-L1 antibody) in Chinese patients are limited. Phase I/Ib, open-label, dose-escalation study of Chinese patients with advanced solid tumors. Primary study objectives were to evaluate the maximum tolerated dose (MTD) and pharmacokinetics (PK) of avelumab.

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Background: Face mask wearing has been an important part of the response to the COVID-19 pandemic. As vaccination coverage progresses in countries, relaxation of such practices is increasing. Subsequent COVID-19 surges have raised the questions of whether face masks should be encouraged or required and for how long.

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Introduction: Medical therapy is the first-line treatment for gastroesophageal reflux disease, but surgical options are available and shown to be effective when medical management fails. There is no consensus for when a surgical evaluation is indicated. We set out to determine if the GERD-HRQL questionnaire scores correlate to objective findings found in patients undergoing anti-reflux surgery to predict when surgical consultation could be warranted.

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Avelumab (anti-PD-L1) is an approved anticancer treatment for several indications. The JAVELIN Gastric 100 phase III trial did not meet its primary objective of demonstrating superior overall survival (OS) with avelumab maintenance versus continued chemotherapy in patients with advanced gastric cancer/gastroesophageal junction cancer; however, the OS rate was numerically higher with avelumab at timepoints after 12 months. Machine learning (random forests, SIDEScreen, and variable-importance assessments) was used to build models to identify prognostic/predictive factors associated with long-term OS and tumor growth dynamics (TGDs).

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In patients with advanced heart failure and deteriorating clinical status, a left ventricular assist device (LVAD) can be used as a bridge to transplantation or as an alternative to transplantation. An uncommon complication of orthotopic heart transplant or LVADs is diaphragmatic hernia during implantation or explantation of the device. We describe a patient with a diaphragmatic hernia with incarcerated colon and small bowel treated previously with a HeartMate 3 LVAD and subsequent transplantation.

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Histone acetylation is involved in the regulation of seed germination. The transcription factor ABI5 plays an essential role in ABA- inhibited seed germination. However, the molecular mechanism of how ABI5 and histone acetylation coordinate to regulate gene expression during seed germination is still ambiguous.

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Background: Predictive biomarkers could allow more precise use of immune checkpoint inhibitors (ICIs) in treating advanced cancers. Given the central role of HLA molecules in immunity, variation at the HLA loci could differentially affect the response to ICIs. The aim of this epidemiological study was to determine the effect of HLA-A*03 as a biomarker for predicting response to immunotherapy.

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We report real-world treatment patterns and outcomes in patients with PD-L1+ non-small-cell lung cancer (NSCLC). This retrospective, observational study using the ConcertAI Oncology Dataset (Symphony AI, CA, USA), included patients with PD-L1+ (≥1% expression) metastatic NSCLC who began first-line (1L) treatment between 2016 and 2019. Treatment outcomes were assessed by treatment class (immune checkpoint inhibitor [ICI] monotherapy, ICI combinations or chemotherapy).

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Purpose: The CLASSICAL-Lung clinical trial tested the combination of pepinemab, an IgG4 humanized mAb targeting semaphorin 4D, with the PD-L1 inhibitor avelumab to assess the effects of coupling increased T-cell infiltration and reversal of immune suppression via pepinemab with sustained T-cell activation via checkpoint inhibition.

Patients And Methods: This phase Ib/II, single-arm study was designed to evaluate the safety, tolerability, and efficacy of pepinemab in combination with avelumab in 62 patients with advanced non-small cell lung cancer (NSCLC), including immunotherapy-naïve (ION) patients and patients whose tumors progressed following anti-PD-1/L1 monotherapy (IOF). The main objectives were to evaluate safety/tolerability, establish a recommended phase 2 dose (RP2D), obtain a preliminary evaluation of antitumor activity, and investigate candidate biomarker activity.

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Background: Thymic epithelial tumors are PD-L1-expressing tumors of thymic epithelial origin characterized by varying degrees of lymphocytic infiltration and a predisposition towards development of paraneoplastic autoimmunity. PD-1-targeting antibodies have been evaluated, largely in patients with thymic carcinoma. We sought to evaluate the efficacy and safety of the anti-PD-L1 antibody, avelumab (MSB0010718C), in patients with relapsed, advanced thymic epithelial tumors and conduct correlative immunological studies.

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The mechanisms for cardiac injury after hemorrhagic shock (HS) are unresolved. We hypothesize that remote organ damage can be caused by uncontrolled pancreatic proteolytic activity, as enteral protease inhibition improves outcomes in experimental HS. Uncontrolled proteolysis in the heart may disrupt cardiac metabolism and adrenergic control with subsequent deleterious outcomes.

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