Adherence and Quality of Life in Adult Patients With Haemophilia A, Haemophilia B and Von Willebrand Disease: A National Cross-Sectional Survey

Background: New treatments for patients with bleeding disorders (PWB) have emerged, including products with extended half-life and subcutaneous administration. These less frequent treatments can potentially enhance quality of life (QoL), but adherence becomes critically important. Aim: To investigate adherence and QoL among PWB and explore the correlation between treatment adherence and QoL in adult patients with haemophilia A (HA), haemophilia B (HB) and Von Willebrand disease (vWD) in Denmark. Method: This survey used disease-specific patient-reported questionnaires: Veritas-PRO and Veritas-PRN to measure adherence, and Haemo-A-QoL and VWD-QoL to assess QoL. Results: Responses were obtained from 149 patients with HA, 32 with HB and 118 with vWD. Adherence was reported by 87.1% of patients on prophylaxis and 71.2% of patients treated on demand, according to Veritas-PRO and Veritas-PRN cut-off scores. High QoL was generally reported, decreasing with age in HA and HB, but not in vWD. Conclusion: Danish patients with HA, HB and vWD reported high QoL and high adherence to prescribed treatments. There was no correlation between treatment adherence and QoL among the different patient groups. These findings highlight the need for further research to better understand adherence behaviours and identify opportunities to further improve QoL in PWB.