F8 and hemophilia: Severe haemophilia was associated with a similar thrombin potential as therapeutic warfarin (INR ≥2); however, non‐severe haemophilia was associated with higher mean thrombin potential, and a third of patients had thrombin potential above the upper cut‐off of patients on therapeutic anticoagulation (30% of people with FVIII 1%–19%, and 48% of those with FVIII 20%–50%).