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Introduction: Females with haemophilia A (HA [FHAs]) and HA carriers (HACs) have an increased risk of bleeding and complications compared to the general population. Aim: To examine the characteristics, billed annualised bleed rates (ABRb), costs and healthcare resource utilisation for males with HA (MHAs), FHAs and HACs in the United States. Methods: Data were extracted from the IBM® MarketScan® Research Databases (Commercial and Medicaid) for claims during the index period (July 2016 to September 2018) and analysed across MHAs, FHAs and HACs. Results: Dual diagnosis females (DDFs; both HA and HAC claims) were grouped as a separate cohort. MHAs were generally younger than females (all cohorts) by up to 19 years (Commercial) and 23 years (Medicaid). ABRb >0 was more frequent in females. Factor VIII claims were higher for MHAs versus female cohorts. Joint‐related health issues were reported for 24.4 and 25.6% (Commercial) and 29.3 and 26.6% (Medicaid) of MHAs and FHAs, respectively; lower rates were reported in the other two cohorts. Heavy menstrual bleeding claims occurred for approximately a fifth (Commercial) to a quarter (Medicaid) of female cohorts. All‐cause emergency department and inpatient visits in FHAs and DDFs were similar to, or more frequent than, those in MHAs; bleed‐related inpatient visits were infrequent. In MHAs (Commercial), mean all‐cause total costs ($214,083) were higher than in FHAs ($40,388), HACs ($15,647) and DDFs ($28,320) with similar trends for Medicaid patients. Conclusions: FHAs and HACs may be undermanaged and undertreated. Further research is needed to fully understand these cohorts' bleeding rates, long‐term complications and costs. [ABSTRACT FROM AUTHOR]

Introduction: In recent years, there has been increased focus on individualizing treatment for persons with hemophilia including pharmacokinetic‐guided (PK) dosing. Aims: In this retrospective study clinical outcomes before and after PK‐guided prophylaxis were examined. Materials and methods: Eight Haemophilia Treatment Centres from the United States participated in the study and included 132 patients classified into two cohorts: those undergoing a PK‐assessment for product switch (switchers) or to optimize treatment (non‐switchers). Subset analyses for the two most common products and patients with dosing per prescription label were included for annual bleeding rates (ABR), mean weekly consumption outcomes, and annualized cost of prophylaxis. Results: The most common products before and after index date were octocog alfa, rurioctocog alfa pegol, and efmoroctocog alfa. Seventy‐four (56%) patients were identified as switchers and 58 (44%) patients were classified as non‐switchers. The majority of patients (78.0%) experienced either a decrease in ABR post‐index or maintained 0 ABR during pre‐ and post‐index time periods, with similar proportions identified in both switchers (77.0%) and non‐switchers (79.3%) populations. Non‐switchers were identified as having no significant change in cost of therapy, while switchers experienced increased cost of therapy driven by higher price of extended half‐life products. Within subset analyses, patients receiving rurioctocog alfa pegol and efmoroctocog alfa had mean ABR under 1 after index date. Conclusion: PK‐guided prophylaxis has the potential to improve clinical outcomes without increase in cost of therapy for patients maintaining product and can aid in maintaining effective protection against bleeds in those switching product. [ABSTRACT FROM AUTHOR]