Publications by authors named "Sam Keeping"

Article Synopsis
  • In the absence of direct comparisons, researchers used unanchored matching-adjusted indirect comparisons to evaluate the effectiveness of zanubrutinib against ibrutinib and rituximab in patients with relapsed or refractory marginal zone lymphoma (MZL).
  • They applied logistic propensity score models to align patient data from two phase II trials with aggregate data from larger studies involving ibrutinib and rituximab, focusing on factors like previous treatments, MZL subtype, and patient age.
  • Results indicated that zanubrutinib provided significant improvements in overall response and progression-free survival compared to both ibrutinib and rituximab for patients with previously treated MZL.
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Background: Molecular tests can detect lower concentrations of viral genetic material over a longer period of respiratory infection than antigen tests. Delays associated with central laboratory testing can result in hospital-acquired transmission, avoidable patient admission, and unnecessary use of antimicrobials, all which may lead to increased cost of patient management. The aim of this study was to summarize comparisons of clinical outcomes associated with rapid molecular diagnostic tests (RMDTs) versus other diagnostic tests for viral respiratory infections.

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Brexucabtagene autoleucel (brexu-cel) is an autologous anti-CD19 CAR T-cell therapy approved in the USA and European Union (EU) for adults with relapsed or refractory B-cell acute lymphoblastic leukemia (R/R B-ALL; aged ≥26 years in EU). Here, outcomes for patients with R/R B-ALL aged ≥26 years in ZUMA-3 treated with brexu-cel were compared with historical standard-of-care (SOC) therapy. After median follow-up of 26.

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Article Synopsis
  • * An indirect comparison study was conducted to evaluate the effectiveness of brexu-cel against pirtobrutinib, using patient data to account for various prognostic factors, including disease stage and prior treatments.
  • * Results indicated that brexu-cel led to significantly higher response rates and improved progression-free survival compared to pirtobrutinib, suggesting it might be a more effective treatment option for this patient population.
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Article Synopsis
  • - The SCHOLAR-2 study showed that patients with relapsed/refractory mantle cell lymphoma (MCL) had poor overall survival using standard care after failing a Bruton tyrosine kinase inhibitor.
  • - In the ZUMA-2 trial, the CAR T-cell therapy brexucabtagene autoleucel (brexu-cel) showed high and lasting response rates in similar patients with prior BTKi treatment.
  • - Comparing overall survival rates, brexu-cel significantly outperformed standard care across multiple statistical methods, indicating better survival outcomes for patients with R/R MCL after BTKi failure.
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Introduction: Brexucabtagene autoleucel (brexu-cel), a CD19-directed chimeric antigen receptor T-cell therapy, is approved for relapsed/refractory B-cell precursor acute lymphoblastic leukemia in adults aged 18+/26+ years in the US/European Union (EU), based on efficacy results from the single-arm ZUMA-3 trial. This study aimed to estimate the relative treatment effects of brexu-cel versus inotuzumab ozogamicin (InO), blinatumomab (blina), and chemotherapies using unanchored matching-adjusted indirect comparison (MAIC) methods.

Methods: Individual patient data from ZUMA-3 and published aggregate level data from two randomized controlled trials, INO-VATE (InO versus chemotherapy) and TOWER (blina versus chemotherapy), were used.

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Objectives: In randomized-controlled crossover design trials, overall survival (OS) treatment effect estimates are often confounded by the control group benefiting from treatment received post-progression. We estimated the adjusted OS treatment effect in EMPOWER-Lung 1 (NCT03088540) by accounting for the potential impact of crossover to cemiplimab among controls and continued cemiplimab treatment post-progression.

Methods: Patients were randomly assigned 1:1 to cemiplimab 350 mg every 3 weeks (Q3W) or platinum-doublet chemotherapy.

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Article Synopsis
  • * Data collected from 240 patients in Europe indicates a median overall survival of 14.6 months following the start of initial BTKi therapy, with varying outcomes based on subsequent treatments.
  • * Patients who received further therapy after BTKi failure had a median overall survival of 23.8 months, particularly with lenalidomide and bendamustine plus rituximab, providing a new benchmark for treatment effectiveness.
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In the absence of a randomized head-to-head trial, an unanchored matching-adjusted indirect comparison was performed to estimate the relative treatment effects of axicabtagene ciloleucel (axi-cel; ZUMA-1) versus lisocabtagene maraleucel (liso-cel; TRANSCEND-NHL-001) for treatment of relapsed/refractory (R/R) large B-cell lymphoma (LBCL) after at least two lines of therapy. After matching, axi-cel and liso-cel had comparable objective response rates and duration. Compared to liso-cel, axi-cel was associated with improvements in overall survival (hazard ratio [HR]: 0.

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Article Synopsis
  • The study focuses on evaluating the effectiveness of cemiplimab, an immune-oncology therapy, for treating advanced non-small-cell lung cancer (NSCLC) with high PD-L1 expression, comparing it to pembrolizumab and other therapies in clinical trials from 2010-2020.
  • A systematic review and network meta-analysis were conducted, indicating that cemiplimab significantly improves progression-free survival (PFS) and objective response rate (ORR) compared to pembrolizumab, while showing comparable overall survival (OS) rates.
  • The analysis revealed no significant differences in severe adverse events between cemiplimab and pembrolizumab, suggesting similar safety profiles for both treatments
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Background: Overall survival (OS) is the most patient-relevant outcome in oncology; however, in early cancers, large sample sizes and extended follow-up durations are needed to detect statistically significant differences in OS between interventions. Use of early time-to-event outcomes as surrogates for OS can help facilitate faster approval of cancer therapies. In locally advanced head and neck squamous cell carcinoma (LA-HNSCC), event-free survival (EFS) was previously evaluated as a surrogate outcome (Michiels 2009) and demonstrated a strong correlation with OS.

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To compare pembrolizumab with competing interventions for previously untreated, unresectable or metastatic microsatellite instability-high or mismatch repair-deficient colorectal cancer. Trials were identified via a systematic literature review and synthesized using a Bayesian network meta-analysis with time-varying hazard ratios (HRs). Using intention-to-treat data, HRs for overall survival were generally in favor of pembrolizumab but not statistically significant; however, statistical significance was reached versus all comparators by month 16 when accounting for crossover.

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Objectives: This study aimed to evaluate the cost-effectiveness, from a US commercial payer perspective, of cemiplimab versus other first-line treatments for advanced non-small cell lung cancer with programmed death-ligand 1 expression ≥50%.

Methods: A 30-year "partitioned survival" model was constructed. Overall survival and progression-free survival were estimated by applying time-varying hazard ratios from a network meta-analysis of randomized clinical trials.

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Most cutaneous squamous cell carcinomas (CSCCs) can be treated with surgical excision or radiation; however, approximately 1% of patients develop advanced disease. In 2018, the FDA approved cemiplimab-rwlc as the first programmed cell death-1 (PD-1) monoclonal antibody for the treatment of patients with metastatic CSCC or locally advanced CSCC who are not candidates for curative surgery or curative radiation. In June 2020, pembrolizumab, another PD-1 monoclonal antibody, was approved for the treatment of patients with recurrent or metastatic CSCC who are not candidates for curative surgery or radiation.

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Objectives: To evaluate the cost-effectiveness of cemiplimab in patients with advanced cutaneous squamous cell carcinoma (CSCC) from a payer perspective in the United States.

Methods: A partitioned survival model was developed to assess the cost-effectiveness of cemiplimab versus historical standard of care (SOC). All inputs were identified based on a systematic literature review, supplemented by expert opinion where necessary.

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Article Synopsis
  • - The study conducted a systematic review and network meta-analysis to evaluate the efficacy and safety of various biologics and tofacitinib for treating moderate-to-severe ulcerative colitis (UC), using vedolizumab as the reference treatment.
  • - A total of 19 studies were analyzed, revealing that adalimumab and other treatments had lower rates of clinical remission compared to vedolizumab, while infliximab showed higher rates of remission and response.
  • - The findings suggest that vedolizumab may have a better balance of efficacy and safety compared to other advanced therapies for UC, with tofacitinib showing a higher risk of infection despite its treatment effectiveness.
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To estimate the comparative effectiveness of nivolumab versus standard of care (SOC) in terms of overall survival (OS) for small-cell lung cancer patients treated with two prior lines of chemotherapy, in other words, third line in the USA. Data were from CheckMate 032, a single-arm trial of nivolumab, and real-world electronic patient records. Comparisons of OS were conducted using three different methods to adjust for differences (regression, weighting and doubly robust) between the populations.

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Article Synopsis
  • The study compares the effectiveness of cemiplimab, a drug that blocks programmed cell death, to EGFR inhibitors and other treatments for patients with advanced skin cancer.
  • Cemiplimab showed significant improvements in overall survival and progression-free survival, highlighted by lower hazard ratios compared to other treatments.
  • Overall, cemiplimab appears to be a more effective option for improving survival rates in patients with advanced cutaneous squamous cell carcinoma.
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Axicabtagene ciloleucel (axi-cel) and tisagenlecleucel (tisa-cel) are autologous anti-CD19 chimeric antigen receptor T (CAR T) cell therapies for the treatment of patients with relapsed/refractory large B cell lymphoma (RR-LBCL). Both can induce durable responses; however, cross-trial comparisons are difficult due to differences in study design. In this study, the registration trials of axi-cel and tisa-cel were compared using a matching adjusted indirect comparison (MAIC).

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To estimate the comparative efficacy of nivolumab ± ipilimumab versus alternative treatments for small-cell lung cancer after at least one prior line of chemotherapy. A systematic literature review identified six randomized controlled trials (RCTs) that could be connected in a network. The Kaplan-Meier survival curves from these RCTs were synthesized using network meta-analysis models.

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Background: The threat posed by Meticillin-resistant (MRSA) has taken on an increasingly pan-European dimension. This article aims to provide an overview of the different approaches to the control of MRSA adopted in five European countries (Austria, Germany, Netherlands, Spain, and the UK) and discusses data and reporting mechanisms, regulations, guidelines, and health policy approaches with a focus on risk communication. Our hypothesis is that current infection control practices in different European countries are implicit messages that contribute to the health-related risk communication and subsequently to the public perception of risk posed by MRSA.

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Children and adolescents experience some of the highest rates of influenza infection and the subsequent burden on both infected children and their parents/carers is substantial. Vaccinating children and adolescents against seasonal influenza has the potential to reduce the burden of disease in both vaccinated and unvaccinated individuals due to the pivotal role that younger age groups play in the transmission of infection. While countries such as the USA, Canada and the UK have consequently recommended the universal vaccination of children, the vast majority of European countries have not yet extended their vaccination policies to this age group.

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Background: Penile cancer is a rare malignancy in Western countries, with an incidence rate of around 1 per 100,000. Due to its rarity, most treatment recommendations are based on small trials and case series reports. Furthermore, data on the resource implications are scarce.

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