Bleeding Risk Evaluation in Haemophilia Patients Under Antiplatelet Therapies

Study Overview
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Brief Summary
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Life expectancy of haemophilia patients (specially severe) has dramatically increase in the last decades, which lead to the apparition of aging diseases such as cardiovascular disease, with the potential bleeding risk of antiplatelet therapies and anticoagulants. The primary endpoint of the study is to evaluate this bleeding risk in haemophilia patients (all severity) with such treatment in comparison to non treated patients, according to the number of bleeding events in the last year reported by the haemophilia patients under study treatment (antiplatelet and anticoagulant) in comparison to haemophilia patients free of such treatment. The main hypothesis is that antiplatelet and anticoagulant therapy can be safely used in minor haemophilia patients but might lead to increase bleeding risk in other haemophilia patients. Secondary endpoint consist in: Evaluate the impact of know cardio-vascular risk in haemophilia patients (Odd ratios=OR) Evaluate the number of sever bleeding event in patient under study treatments compared to the control group Evaluate the overall consumption of factor VIII or IX supply in patients under study treatments compared to control group Estimate the stenosis relapse risk in haemophilia patients with arterial STENT Estimate the embolic risk of haemophilia patients with atrial fibrillation Population description: Haemophilia patients (man, all severity) Age above 50 years, followed during the last 5 years in one of the study centre

Official Title
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Bleeding Risk Evaluation in Haemophilia Patients Under Antiplatelet Therapies

Conditions
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Hemophilia

Intervention / Treatment
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* Other: Non interventional study


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male Age above 50 years Hemophilia A or B carriers Followed within the 5 last years in one of the research center Exclusion Criteria: Jurisdictional prevention procedures Other medical condition that might interfere with the bleeding risk (Willebrand's disease, Other coagulation factor deficiencies, haematological malignancies, …) Other drugs that might interfere with the bleeding risk (Serotonin reuptake inhibitors) Patient refusal

Ages Eligible for Study
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Minimum Age: 50 Years

Sexes Eligible for Study
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Male

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| First group<br>Haemophilia patients with history of either cardiovascular disease or atrial fibrillation undergoing an antiplatelet or anticoagulant prophylaxis | Other: Non interventional study<br>* A query form to all concerned patients by each investigating centre will be send<br>|
| Control group<br>Haemophilia patient without such history or treatment matched on age and disease status (haemophilia A or B and the severity of the disease : severe, mild, minor). | Other: Non interventional study<br>* A query form to all concerned patients by each investigating centre will be send<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of bleeding occurrences |  | last 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Haemophilia, Atherosclerosis, Atrial fibrillation, Antiplatelets, Anticoagulant