Reference Values for the Haemophilia Joint Health Score in Patients With Severe Haemophilia Derived From the Canadian Bleeding Disorder Registry

This study provides the first national age-based reference values for the HJHS in individuals with severe Haemophilia A and B. These values allow clinicians to interpret joint health scores relative to age-specific expectations. Future research should extend age-specific HJHS reference values to additional national registries to strengthen global interpretation and comparison of joint health outcomes.