Publications by authors named "Nirav Shah"

In recent years, significant efforts have been made to improve methods for genomic studies of admixed populations using local ancestry inference (LAI). Accurate LAI is crucial to ensure that downstream analyses accurately reflect the genetic ancestry of research participants. Here, we test analytic strategies for LAI to provide guidelines for optimal accuracy, focusing on admixed populations reflective of Latin America's primary continental ancestries-African (AFR), Amerindigenous (AMR), and European (EUR).

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  • * These CAR T cells are created from a patient's own cells, designed to specifically target tumor markers, which helps reduce side effects while boosting effectiveness in eliminating cancer.
  • * Despite their potential, many patients experience treatment failure or relapse due to various resistance mechanisms, prompting the exploration of new strategies to enhance CAR T-cell therapy outcomes.
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  • - Vitamin D insufficiency and deficiency are common in chronic kidney disease (CKD) patients, prompting a study to create a pharmacokinetic model for oral cholecalciferol (VitD) and its metabolites in this population.
  • - The study involved 29 CKD patients who were given a single dose of oral VitD, using nonlinear mixed effects modeling to analyze how the drug and its metabolites are processed in the body.
  • - The results indicate that personalized dosing strategies of 600 to 1000 I.U. of VitD per day may be ideal for reaching target 25-hydroxyvitamin D levels, potentially improving treatment for CKD patients.
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  • A study was conducted to evaluate the effectiveness of montelukast versus a placebo in helping outpatients with mild to moderate COVID-19 recover from symptoms more quickly.
  • The trial included 1,250 participants over 30 years old with confirmed COVID-19 symptoms for less than a week, who were randomly assigned to receive either montelukast or a placebo for 14 days.
  • Results showed no significant difference in recovery time between the montelukast and placebo groups, with both groups having a median recovery time of 10 days and no reported deaths.
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Importance: Large language models (LLMs) can assist in various health care activities, but current evaluation approaches may not adequately identify the most useful application areas.

Objective: To summarize existing evaluations of LLMs in health care in terms of 5 components: (1) evaluation data type, (2) health care task, (3) natural language processing (NLP) and natural language understanding (NLU) tasks, (4) dimension of evaluation, and (5) medical specialty.

Data Sources: A systematic search of PubMed and Web of Science was performed for studies published between January 1, 2022, and February 19, 2024.

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Background: Early diagnostic uncertainty for infection causes delays in antibiotic administration in infected patients and unnecessary antibiotic administration in noninfected patients.

Objective: To develop a machine learning model for the early detection of untreated infection (eDENTIFI), with the presence of infection determined by clinician chart review.

Derivation Cohort: Three thousand three hundred fifty-seven adult patients hospitalized between 2006 and 2018 at two health systems in Illinois, United States.

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Foundational training in critical care medicine is an integral part of both undergraduate and graduate medical education. Yet, many medical school graduates enter residency underprepared to care for critically ill patients because of a lack of ubiquity of undergraduate critical care education and the heterogeneity of existing didactic and clinical experiences. This Perspective explores the importance of undergraduate critical care education, the current national and international landscape, innovative educational strategies and exemplar curricula, and recent advances in assessment that may better reflect learner-centered educational outcomes.

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  • Bruton tyrosine kinase inhibitors (BTKi) have significantly improved treatment for B-cell malignancies, but many patients stop using them due to side effects, with cardiac issues being the most common reason for discontinuation.* -
  • The BRUIN study tested pirtobrutinib, a new non-covalent BTKi, on 127 patients who were intolerant to previous BTKi treatments, finding that many experienced fewer or no cardiac issues while showing a high overall response rate.* -
  • Results indicated pirtobrutinib had a median time on treatment of 15.3 months, with notable side effects like fatigue and neutropenia; overall, it proved to be a safe and effective alternative for
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Importance: Timely intervention for clinically deteriorating ward patients requires that care teams accurately diagnose and treat their underlying medical conditions. However, the most common diagnoses leading to deterioration and the relevant therapies provided are poorly characterized.

Objectives: We aimed to determine the diagnoses responsible for clinical deterioration, the relevant diagnostic tests ordered, and the treatments administered among high-risk ward patients using manual chart review.

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In this study, we compare outcomes of older patients with primary diffuse large B-cell lymphoma of the central nervous system (PCNSL) undergoing autologous hematopoietic cell transplantation (autoHCT) with either thiotepa/carmustine (BCNU/Thio) or thiotepa/busulfan/cyclophosphamide (TBC) conditioning. We used a postpublication dataset made available by the Center for International Blood and Marrow Transplantation Research including patients who were ≥65 years in age with PCNSL and underwent autoHCT as consolidation with TBC or BCNU/Thio conditioning. Out of 147 patients; n = 84 received BCNU/Thio and n = 63 received TBC.

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T-cell-engaging bispecific antibodies (TCEs) that target tumor antigens and T cells have shown great promise in treating cancer, particularly in hematological indications. The clinical development of TCEs often involves a lengthy first-in-human (FIH) trial with many dose-escalation cohorts leading up to an early proof of concept (POC), enabling either a no-go decision or dose selection for further clinical development. Multiple factors related to the target, product, disease, and patient population influence the efficacy and safety of TCEs.

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  • South Asian adults in the US have higher cardiovascular disease (CVD) risk compared to other groups, and the effectiveness of lifestyle interventions specifically for them had not been previously assessed.
  • A clinical trial aimed to determine if a culturally adapted group lifestyle intervention would more effectively improve CVD risk factors compared to basic written health education materials for South Asian adults aged 18 to 65.
  • The intervention involved a 16-week program focusing on lifestyle changes, delivered in multiple languages, with follow-up support, while the control group only received written materials; outcomes focused on changes in key health metrics and self-reported behaviors.
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In recent years, significant efforts have been made to improve methods for genomic studies of admixed populations using Local Ancestry Inference (LAI). Accurate LAI is crucial to ensure downstream analyses reflect the genetic ancestry of research participants accurately. Here, we test analytic strategies for LAI to provide guidelines for optimal accuracy, focusing on admixed populations reflective of Latin America's primary continental ancestries - African (AFR), Amerindigenous (AMR), and European (EUR).

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  • - The study investigates the role of genetics in postoperative nausea and vomiting (PONV), which impacts patient satisfaction and results in unplanned hospital admissions after surgery, hypothesizing that genetic factors might explain some of the variability in risk that traditional factors do not cover.
  • - Researchers conducted a genome-wide association study using data from patients at Michigan Medicine and Vanderbilt University Medical Center, identifying 46 genetic variants associated with PONV and developing a polygenic risk score to better predict occurrences in different patient cohorts.
  • - Findings showed that higher polygenic risk scores corresponded with increased risk for developing PONV, suggesting that genetic predisposition combined with known clinical risks can improve understanding and prediction of this complication in surgical patients.
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  • HA-coated femoral stems were developed to improve the stability and longevity of hip implants in total hip arthroplasty (THA).
  • A study followed 326 patients for an average of 9.39 years, using various clinical and radiological measures to assess outcomes, with a focus on stem survival.
  • Results showed 100% survival from aseptic loosening and excellent patient-reported outcomes, confirming effective osseointegration of the implants.
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Purpose: Intraoperative hypoglycemia is presumed to be rare, but generalizable multicentre incidence and risk factor data for adult patients are lacking. We used a multicentre registry to characterize adults with intraoperative hypoglycemia and hypothesized that intraoperative insulin administration would be associated with hypoglycemia.

Methods: We conducted a cross-sectional retrospective multicentre cohort study.

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Background: With recent advancements in the treatment of chronic lymphocytic leukemia (CLL) and mantle cell lymphoma (MCL), healthcare specialists may face challenges making treatment and management decisions based on latest evidence for the optimal care of patients with these conditions. This study aimed to identify specific knowledge, skills, and confidence gaps impacting the treatment of CLL and MCL, to inform future educational activities.

Methods: Hematologists and hemato-oncologists (HCPs, n = 224) from France (academic settings), Germany, and the United States (academic and community settings) responded to a 15-minute quantitative needs assessment survey that measured perceived knowledge, skills, and confidence levels regarding different aspects of treatment and management of CLL and MCL patients, as well as clinical case questions.

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  • Richter transformation is a serious form of aggressive lymphoma found in about 10% of chronic lymphocytic leukemia patients, with no approved treatments and a grim outlook.
  • Pirtobrutinib, showing good results for patients with B-cell malignancies who have relapsed or are resistant to conventional therapies, is being studied for its safety and effectiveness in treating Richter transformation.
  • The study included 82 adult patients who received pirtobrutinib daily, tracking overall response rates and safety, with results indicating the drug was well tolerated and active in this difficult subset of cancer patients.
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Background And Objective: To develop the COVid Veteran (COVet) score for clinical deterioration in Veterans hospitalized with COVID-19 and further validate this model in both Veteran and non-Veteran samples. No such score has been derived and validated while incorporating a Veteran sample.

Derivation Cohort: Adults (age ≥ 18 yr) hospitalized outside the ICU with a diagnosis of COVID-19 for model development to the Veterans Health Administration (VHA) (n = 80 hospitals).

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  • * A study analyzed data from patients treated with auto-HCT (281 patients) and CAR-T (79 patients) between 2015 and 2021, revealing that auto-HCT had a higher 2-year progression-free survival (66.2% vs. 47.8%) and lower relapse rate (27.8% vs. 48%).
  • * The findings suggest that auto-HCT is a more effective treatment option in select patients with relapsed D
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The International Subarachnoid Aneurysm Trial led to a shift from clipping to endovascular coiling as the primary therapy for cerebral aneurysm particularly in the management of posterior circulation aneurysm. However, endovascular therapy is often unavailable in low-resource settings, emphasizing the importance of maintaining surgical skill sets in resource-poor countries. This article presents a detailed case report on the successful microneurosurgical management of a 65-year-old female with a history of headache and weakness with past history of hypertension and a right posterior cerebral artery territory infarct who was diagnosed with a ruptured aneurysm situated within the intracranial vertebral artery.

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In 2023, approximately 650,000 people experienced homelessness (PEH) nightly in the United States, the highest number recorded in the country's history. This alarming statistic has made homelessness a key issue in the 2024 elections, especially with the White House's goal to reduce homelessness by 25% by 2025. Despite efforts and investments, homelessness remains a persistent public health challenge.

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