Inclusion Criteria:  People with serious haemophilia, i.e., with (A or B) moderate or severe haemophilia; People aged 60 years or over; People included in the FranceCoag registry; People followed in one of the Haemophilia Treatment Centre participating in the study; People who do not oppose to participate in the study.  Exclusion Criteria:  People with comprehension disabilities; Participants who a posteriori oppose to participate in the study.