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Assessing prophylactic use and clinical outcomes in hemophilia A patients treated with rVIII‐SingleChain and other common rFVIII products in Germany
Author(s) -
Olivieri Martin,
Sommerer Patrick,
Maro Geraldine,
Yan Songkai
Publication year - 2020
Publication title -
european journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 84
eISSN - 1600-0609
pISSN - 0902-4441
DOI - 10.1111/ejh.13378
Subject(s) - medicine , dosing , bleed , prophylactic treatment , gastroenterology , surgery
Objective To evaluate real‐world outcomes with rVIII‐SingleChain and other commonly used recombinant FVIII (rFVIII) products. Methods Hemophilia treatment centers in Germany (n = 21) contributed patient chart data. Inclusion criteria were prophylactic treatment with one of five rFVIII products for ≥8 weeks. Results Male patients (n = 225) were included: rVIII‐SingleChain (n = 40), rFVIIIFc (n = 47), octocog alfa (rFVIII; n = 58), octocog alfa (BAY 81‐8973; n = 40), or moroctocog alfa (n = 40). In patients with severe disease (n = 76), 66.6%, 70.0%, 20.0%, 7.7%, and 27.3% were dosed ≤2×/week, respectively. Irrespective of dosing frequency, mean annualized bleed rates (ABRs)/annualized spontaneous bleed rates (AsBRs) were 0.3/0.1, 0.8/0.4, 1.1/0.5, 1.5/0.8, and 1.4/0.6, and mean FVIII consumption (IU/kg/week) was 83.2, 97.2, 92.5, 104.0, and 102.1, respectively. Results for all patients were similar. Of the patients on prophylaxis with prior therapy and after switching to rVIII‐SingleChain (n = 21), mean ABR/AsBRs were 0.7/0.3 and 0.2/0.0, respectively. After switching to rVIII‐SingleChain, mean FVIII consumption reduced (109.4 vs 74.5 IU/kg/week), and percentage of patients dosed ≤2×/week increased (0% to 71.4%). Conclusions rVIII‐SingleChain prophylaxis provides excellent bleeding protection, with potentially lowest factor consumption among the products assessed. Patients who switched to rVIII‐SingleChain prophylaxis reduced dosing frequency and consumption compared with prior treatment, with similar or potentially lower bleeding rates.