[Assessment of the budgetary impact of an emicizumab therapy introduction for patients with severe haemophilia A without inhibitor].

Since March 2019, émicizumab is indicated for the treatment of patients with severe haemophilia A without inhibitor. This therapy's price amounts approximately to €33 600 per 4 weeks for a 70kg patient which represents about two times more than a factor VIII concentrates treatment's price. This study aims to assess the budgetary impact for the French Health Insurance of an émicizumab therapy introduction for patients with severe haemophilia A without inhibitor. It was an observational, retrospective, and monocentric study. Every severe haemophilia A without inhibitor patient over 18 years old followed at the Cochin Hospital haemophilia treatment centre who received émicizumab from June 2020 and for at least one year have been included. The budgetary impact was estimated by comparing the total costs of patient care the year before versus the year after émicizumab initiation. Total costs of patient care included prices of i) treatments consumed, ii) consultations with specialist physicians, iii) hospitalizations and iv) imaging procedures. Thirty-eight patients were included. The total cost of patient care increased significantly the year after émicizumab introduction (P < 0.0001). On average, this cost was estimated at €537 887 ± €137 139 per patient whereas it was at €151 442 ± €94 708 the year before. While costs of physician consultations increased, no significant difference has been reported about hospitalizations and imaging costs. Over a one-year period, émicizumab therapy significantly increased the total costs of patient care. It is mostly caused by the drug price itself.

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