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    BACKGROUND: Standard of care for patients with severe hemophilia A (HA) is life-long prophylaxis with factor VIII (FVIII) concentrate or other hemostatic agents. Published literature highlights a wide range of treatment costs for patients with HA. OBJECTIVE: To estimate average annual health care costs and resource utilization for a cross-section of adult patients managed with FVIII concentrate prophylaxis using recent data from a large US commercial claims database. METHODS: Adult males with 1 or more claim with HA diagnosis, continuous commercial plan enrollment, and 4 or more FVIII prescription dispenses during 12 months were identified from IBM MarketScan Research Database from January 2013 to September 2019, excluding those with FVIII inhibitors, an HIV/AIDS diagnosis, or diagnosis and treatment for hepatitis B or C. Patients were classified as using FVIII prophylaxis if they met any of the following definitions: (1) 6 or more FVIII dispenses, (2) a gap of 60 days or less between dispenses, and (3) at least 273 days supply in the 12-month period. Additionally, subgroups of patients meeting each individual definition were examined, with some patients included in all 3 subgroups. RESULTS: The overall cohort included 411 patients who met 1 or more of the 3 definitions, with a mean age of 28.9 years. Subgroups of 401, 325, and 237 patients met the first, second, and third FVIII prophylaxis definitions, respectively. Per-patient mean (SD) annual all-cause health care costs were $654,571 ($380,762) in the overall cohort and ranged from $650,065 ($382,196) to $759,661 ($387,040) among subgroups. Cost of FVIII concentrate accounted for more than 96% of total costs in the overall cohort and in each subgroup. Cost of FVIII in the overall cohort varied according to type of concentrate, with the highest among patients who were treated with both standard and extended half-life (SHL and EHL) FVIII ($784,945), followed by EHL FVIII only ($708,928), SHL FVIII only ($647,800), and plasma-derived FVIII ($535,614). The most common treatment type was SHL FVIII only (45.7% of all patients). In the overall cohort, the majority had 1 or more outpatient visits (94.9%), while emergency department visits, hospital admissions, and home health visits occurred less frequently (27.0%, 7.1%, and 7.1%, respectively). CONCLUSIONS: Commercially insured patients with HA incur substantial all-cause annual health care costs, with FVIII concentrate accounting for a majority of costs. DISCLOSURES: This study was funded by BioMarin Pharmaceutical Inc, which was involved in the protocol development, analysis plan development, data interpretation, manuscript preparation, and publication decisions. All authors contributed to protocol development, analysis plan development, data interpretation, and manuscript development and maintained control over the final content. Thornburg has received professional fees from BioMarin Pharmaceutical, CSL Behring, Genentech, Novo Nordisk, Sanofi Genzyme, HEMA Biologics, and Spark Therapeutics and institutional research funding from BioMarin Pharmaceutical, Novo Nordisk, and Sanofi Genzyme. Adamski, Cook, and Sendhil are employees of Analysis Group, a consulting company that was contracted by BioMarin Pharmaceutical to conduct this study and develop the manuscript. Vembusubramanian is a former employee of Analysis Group. Hinds, Chen, and Sammon are employees and shareholders of BioMarin Pharmaceutical. Solari is a former employee of BioMarin Pharmaceutical. Garrison has received consulting fees from BioMarin Pharmaceutical and Analysis Group. Croteau has received professional fees from BioMarin Pharmaceutical, Bayer, CSL Behring, HEMA Biologics, and Pfizer and institutional research funding from Novo Nordisk and Spark Therapeutics.

    Citation

    Courtney D Thornburg, Kelly Adamski, Keziah Cook, Mohini Vembusubramanian, Selvam R Sendhil, David Hinds, Er Chen, Joshua Sammon, Paul Solari, Louis P Garrison, Stacy E Croteau. Health care costs and resource utilization among commercially insured adult patients with hemophilia A managed with FVIII prophylaxis in the United States. Journal of managed care & specialty pharmacy. 2022 Apr;28(4):449-460

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    PMID: 34958235

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