Health-Related Quality of Life Outcomes and Bleeding Rates Among Patients With Severe Hemophilia A on Emicizumab

Study Overview
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Brief Summary
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The main purposes of this study are to determine if use of emicizumab prophylaxis treatment reduces number of bleeding episodes, if it improves quality of life of individuals and if improves arthropathy in persons with hemophilia A.

Detailed Description
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The main purpose of this study is to determine if use of emicizumab prophylaxis treatment reduces number of bleeding episodes and if it affects quality of life of individuals with hemophilia. Patients with hemophilia A, especially those with severe disease, have recurrent bleeding in joints, muscles and deep tissue and recurrent bleeding in the same joint can result in irreversible damage in bone and cartilage and lead to disabling arthropathy. Treatment involves replacement with exogenous recombinant factor concentrates that can prevent further bleeding episodes but not the ongoing joint damage. In addition, treatment with recombinant factor concentrates can lead to inhibitory antibodies resulting in inability to use those for further treatment. The burden of this disease on patients and caregivers is well recognized. Participant will be asked about bleeding episodes needing additional factor replacement in addition to checking bleeding log prior to starting emicizumab and at additional times after starting emicizumab. In addition, investigators would ask participant to complete questionnaire about participant's and/or their caregiver's quality of life prior to starting emicizumab and at additional times after starting emicizumab. Participant will also have joint scores measured before and at additional times after starting emicizumab. All the information collected will remain confidential and would only be shared with members of study team.

Official Title
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Health-related Quality of Life Outcomes and Bleeding Rates Among Patients With Severe Hemophilia A on Emicizumab: Real World Data

Conditions
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Hemophilia A

Intervention / Treatment
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* Drug: Emicizumab


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria Part A: ABR Signed Informed Consent/Assent Form Age 4 years at time of signing Informed Consent Form Ability to comply with the study protocol, in the investigator's judgment Diagnosis of hemophilia A (any severity) on emicizumab or factor concentrate prophylaxis for at least 12 months each Plan to be adherent to emicizumab prophylaxis during the study Patient with inhibitors Patient without inhibitors Part B: HRQoL and Arthropathy Signed Informed Consent/Assent Form Age 4 years at time of signing Informed Consent Form Ability to comply with the study protocol, in the investigator's judgment Diagnosis of hemophilia A (any severity) who has decided to switch to emicizumab prophylaxis Plan to be adherent to emicizumab prophylaxis during the study Individuals of childbearing age will be included in this study. Their participation involves voluntary completion of a questionnaire. There are no additional precautions required for this population. Patient/parent must be able to read and write English/Spanish Exclusion Criteria: Part A: ABR Patients who are on a clinical trial for prophylaxis Patients with other bleeding disorders needing any scheduled treatment No eligibility restrictions will be based on gender, race, ethnic background or economic status Part B: HRQoL and Arthropathy Patients who are on a clinical trial for prophylaxis Patients with other bleeding disorders needing any scheduled treatment Patients/parents who refuse to complete questionnaire or have joint health assessment by HJHS No eligibility restrictions will be based on gender, race, ethnic background or economic status

Ages Eligible for Study
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Minimum Age: 4 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: Emicizumab|Emicizumab in Hemophilia A|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To obtain and compare the annual bleeding rate in patients with hemophilia A on emicizumab before and after being on emicizumab. | Annualized Bleeding Rates (ABR) | 12 months | 
| To evaluate the health related quality of life in patients with hemophilia A before and after being on emicizumab. | Quality of Life Questionaries | 12 months | 
| To study any clinical changes in arthropathy. | Joint score measurements | 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To study practitioner's preference for emicizumab schedule and how it affects compliance | ABR | 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Bleeding Disorder, Hemophilia, Quality of Life Outcomes, Emicizumab