Clinical Implications of Discrepancy between One-stage Clotting and Chromogenic Factor IX Activity in Haemophilia B
BACKGROUND: Discrepancy in factor IX activity (FIX:C) between one-stage assay (OSA) and chromogenic substrate assay (CSA) in patients with haemophilia B (PwHB) introduces challenges for clinical management.AIM: To study the differences in FIX activity using OSA and CSA in moderate and mild haemophilia B (HB), their impact on classification of severity, and correlation with genotype.METHODS: Single
