Publications by authors named "Jean Abraham"

For 165 million nonelderly Americans, employers provide health insurance either by purchasing a fully insured plan or through self-insurance. By self-insuring, employers bear the financial risk for enrollees' health care spending and are accountable for plan management, either directly or by contracting with a third-party administrator. Using National Association of Insurance Commissioners data, we demonstrate that insurers are deeply entrenched in the provision of administrative services only (ASO) contracts for self-insured employers.

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The inter- and intra-tumor heterogeneity of triple negative breast cancers (TNBC), which is reflected in diverse drug responses, interplays with tumor evolution. Here, we developed a preclinical experimental and analytical framework using treatment-naive TNBC patient-derived tumor xenografts (PDTX) to test their predictive value in personalized cancer treatment approaches. Patients and their matched PDTX exhibited concordant drug responses to neoadjuvant therapy using two trial designs and dosing schedules.

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Whole genome sequencing (WGS) provides comprehensive, individualised cancer genomic information. However, routine tumour biopsies are formalin-fixed and paraffin-embedded (FFPE), damaging DNA, historically limiting their use in WGS. Here we analyse FFPE cancer WGS datasets from England's 100,000 Genomes Project, comparing 578 FFPE samples with 11,014 fresh frozen (FF) samples across multiple tumour types.

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Article Synopsis
  • Mutations in the BRCA1 and BRCA2 genes significantly increase breast cancer risk and are present in about 5% of unselected breast cancer patients.
  • Breast cancer associated with these mutations has unique characteristics and responds better to specific treatments like PARP inhibitors and platinum-based therapies, while showing less sensitivity to CDK4/6 inhibitors.
  • Challenges in identifying patients with these mutations due to low genetic testing rates are discussed, along with current guidelines for testing and the need for timely determination of mutation status to optimize treatment strategies.
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This article is concerned with sample size determination methodology for prediction models. We propose to combine the individual calculations via learning-type curves. We suggest two distinct ways of doing so, a deterministic skeleton of a learning curve and a Gaussian process centered upon its deterministic counterpart.

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PARTNER is a prospective, phase II-III, randomized controlled clinical trial that recruited patients with triple-negative breast cancer, who were germline BRCA1 and BRCA2 wild type. Here we report the results of the trial. Patients (n = 559) were randomized on a 1:1 basis to receive neoadjuvant carboplatin-paclitaxel with or without 150 mg olaparib twice daily, on days 3 to 14, of each of four cycles (gap schedule olaparib, research arm) followed by three cycles of anthracycline-based chemotherapy before surgery.

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Goal: As of January 1, 2021, the Centers for Medicare & Medicaid Services requires most U.S. hospitals to publish pricing information on their website to help consumers make decisions regarding services and to transform negotiations with health insurers.

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Objective: To understand US hospitals' initial strategic responses to the federal price transparency rule that took effect January 2021.

Data Sources And Study Setting: Primary interview data collected from 12 not-for-profit hospital organizations in six US metropolitan markets. All but one organization were multihospital systems; the 12 organizations represent a total of 81 hospitals.

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Employers may respond to minimum wage increases by adjusting their health benefits. We examine the impact of state minimum wage increases on employer health benefit offerings using the 2002-2020 Medical Expenditure Panel Survey - Insurance/Employer Component data. Our primary regression specifications are difference-in-differences models that estimate the relationship between within-state changes in employer-sponsored insurance and minimum wage laws over time.

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Background: Medicare and Medicaid dually eligible beneficiaries (duals) could experience Medicaid coverage changes without losing Medicaid. It is unknown whether health care use and clinical outcomes among elderly duals with coverage changes would be like those among duals without coverage changes or duals ever lost Medicaid and whether various types of unstable coverage due to income/asset changes are associated with worse clinical outcomes.

Objectives: Examine the associations of unstable Medicaid coverage with clinical outcomes among older Medicare beneficiaries.

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Analysis of circulating tumor DNA (ctDNA) to monitor cancer dynamics and detect minimal residual disease has been an area of increasing interest. Multiple methods have been proposed but few studies have compared the performance of different approaches. Here, we compare detection of ctDNA in serial plasma samples from patients with breast cancer using different tumor-informed and tumor-naïve assays designed to detect structural variants (SVs), single nucleotide variants (SNVs), and/or somatic copy-number aberrations, by multiplex PCR, hybrid capture, and different depths of whole-genome sequencing.

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Objective: Genomics is rapidly changing treatment paradigms for cancers, obligating oncologists to have good genomics knowledge. Through this survey, we aimed to assess the current understanding of cancer genomics among UK oncologists.

Methods: We conducted a web-based nation-wide self-assessment survey of the cancer genomics knowledge of UK clinical and medical oncology trainees and consultants.

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Objective: To compare direct-to-consumer (DTC) telemedicine and in-person visits in rates of testing, follow-up health care use, and quality for urinary tract infections (UTIs) and sinusitis.

Data Source: The Minnesota All Payer Claims Data provided 2008-2015 administrative claims data.

Study Design: Using a difference-in-differences approach, we compared episodes of care for UTIs and sinusitis among enrollees of health plans introducing coverage for DTC telemedicine relative to those without DTC telemedicine coverage.

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Personalised approaches to the management of all solid tumours are increasing rapidly, along with wider accessibility for clinicians. Advances in tumour characterisation and targeted therapies have placed triple-negative breast cancers (TNBC) at the forefront of this approach. TNBC is a highly heterogeneous disease with various histopathological features and is driven by distinct molecular alterations.

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Background: Adherence to aromatase inhibitors (AIs) and tamoxifen has considerable survival benefits for postmenopausal women diagnosed with hormone receptor-positive breast cancer. Reduced out-of-pocket costs and treatment-related side effects could increase therapy adherence. Given that individuals' side effect profiles could differ across AIs, generic AI entry could facilitate switching between AIs to manage side effects and improve adherence.

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Background: Over 15.3 million Americans relied on the individual health insurance market for health coverage in 2021. Yet, little is known about the relationships between the organizational characteristics of individual market health insurers and quality of coverage, particularly with respect to clinical outcomes.

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Article Synopsis
  • Previous studies confirmed that the residual cancer burden (RCB) after neoadjuvant chemotherapy predicts long-term outcomes in breast cancer, leading to a pooled analysis to explore this relationship across various cancer subtypes.
  • The analysis involved data from 5161 patients across 12 institutes in Europe and the USA, focusing on their clinical characteristics and the impact of RCB on event-free survival rates.
  • Findings highlighted that RCB scores were significant across all breast cancer subtypes, with higher scores correlating to poorer event-free survival outcomes, indicating the importance of RCB in treatment prognosis.
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Breast cancers are complex ecosystems of malignant cells and the tumour microenvironment. The composition of these tumour ecosystems and interactions within them contribute to responses to cytotoxic therapy. Efforts to build response predictors have not incorporated this knowledge.

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Hyperpolarized C-MRI is an emerging tool for probing tissue metabolism by measuring C-label exchange between intravenously injected hyperpolarized [1-C]pyruvate and endogenous tissue lactate. Here, we demonstrate that hyperpolarized C-MRI can be used to detect early response to neoadjuvant therapy in breast cancer. Seven patients underwent multiparametric H-MRI and hyperpolarized C-MRI before and 7-11 days after commencing treatment.

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As of January 1, 2021, most U.S. hospitals are required to publish pricing information on their website to promote more informed decision making by consumers regarding their care.

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Background: NRG1 gene fusions may be clinically actionable, since cancers carrying the fusion transcripts can be sensitive to tyrosine kinase inhibitors. The NRG1 gene encodes ligands for the HER2(ERBB2)-ERBB3 heterodimeric receptor tyrosine kinase, and the gene fusions are thought to lead to autocrine stimulation of the receptor. The NRG1 fusion expressed in the breast cancer cell line MDA-MB-175 serves as a model example of such fusions, showing the proposed autocrine loop and exceptional drug sensitivity.

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Background: The trade-offs between innovation and pharmaceutical access are central to the policy debate on drug pricing. High prices may limit access, result in medication underuse, and negatively affect outcomes. Generic drugs make treatments more affordable.

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Objective: Using 2019 Centers for Medicare and Medicaid Services data, the authors analyzed performance on behavioral health care quality measures among 168 marketplace insurers offering 185 products and investigated whether performance differed by insurer attributes.

Methods: The authors considered four quality measures: antidepressant medication management, follow-up care for children prescribed attention-deficit hyperactivity disorder medication, follow-up care within 7 days after hospitalization for mental illness, and initiation and engagement of alcohol and other drug dependence treatment. Multivariate regression was used to determine whether performance varied by insurers' nonprofit ownership, Blue Cross-Blue Shield affiliation, Medicaid-managed care participation, and preferred provider organization status.

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Article Synopsis
  • Performance improvement in health care requires considerable investment of time and resources in quality initiatives, especially under value-based contracting models.
  • This study focused on the Ask about Aspirin intervention across four Minnesota health systems to boost low-dose aspirin usage among eligible patients, analyzing the associated costs and benefits.
  • The implementation required about 3,900 hours of personnel effort and cost around $214,385, resulting in a 4.7% increase in aspirin use, equating to approximately 1,530 new users, although outcomes varied by health system.
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