- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03623295
The Dynamic Interplay Between Bleeding Phenotype and Baseline Factor Level in Moderate and Mild Hemophilia A and B (DYNAMO)
There are large inter-individual differences in the bleeding pattern of patients with moderate or mild hemophilia. The major determinant of bleeding phenotype is the level of coagulant factor VIII or IX. In hemophilia A, studies addressing the association between factor VIII level and the clinical bleeding pattern yield conflicting results. In hemophilia B such studies have not yet been performed.
The primary aim of this project is to analyze the association between factor VIII and factor IX levels and the bleeding phenotype. The secondary aim is to analyze potential differences in phenotype between hemophilia A and B.
The project is a multicentre observational cohort study. We will include 500 patients with moderate or mild hemophilia A (FVIII 0.02-0.35 IU/mL) and 500 patients with moderate or mild hemophilia B (FIX 0.02-0.35 IU/mL) who are 12 to 55 years old. The main cohort study consists of clinical data collection, one blood sample and an online questionnaire for patients. Data will be collected on the nature and duration of all bleeding episodes, disease and treatment characteristics, physical activity level and musculoskeletal status. One blood withdrawal will be performed for centralized laboratory assays for FVIII or FIX levels (both one-stage and chromogenic assays) and genetic analysis for the most prevalent prothrombotic mutations. The online questionnaire for patients focuses on bleeds experienced in the past.
A subset of 200 patients aged 24 years or older (100 with moderate or mild hemophilia A and 100 with moderate or mild hemophilia B) will be investigated in more detail by longitudinal data collection including analysis of physical joint status, MRI imaging of joints and biomarkers for joint damage. This longitudinal observation will consist of two time points that lie two years apart, allowing us to identify any changes that occur over the observed time period with respect to joint status.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Anne-Fleur Zwagemaker
- Phone Number: +31205668668
- Email: a.zwagemaker@amc.nl
Study Contact Backup
- Name: Fabienne Kloosterman
- Phone Number: +31205668668
- Email: f.r.kloosterman@amc.nl
Study Locations
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Adelaide, Australia
- Not yet recruiting
- Royal Adelaide Hospital
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Vienna, Austria
- Not yet recruiting
- Medical University of Vienna
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Multiple Locations, Belgium
- Not yet recruiting
- Multicentre: Leuven, Brussels
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Multiple Locations, Canada
- Not yet recruiting
- Multicentre: Vancouver, Toronto, Hamilton
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Helsinki, Finland
- Not yet recruiting
- Helsinki University Central Hospital
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Multiple Locations, Germany
- Not yet recruiting
- Multicentre: Bonn, Berlin, Frankfurt, München, Hamburg
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Multiple Locations, Italy
- Not yet recruiting
- Multicentre: Florence, Rome, Parma, Milan, Turin
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Amsterdam, Netherlands
- Recruiting
- Academic Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Groningen, Netherlands
- Recruiting
- University Medical Center Groningen
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Leiden, Netherlands
- Not yet recruiting
- Leiden University Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Maastricht, Netherlands
- Not yet recruiting
- Maastricht University Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Nijmegen, Netherlands
- Not yet recruiting
- Radboud University Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Rotterdam, Netherlands
- Not yet recruiting
- Erasmus Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Utrecht, Netherlands
- Not yet recruiting
- Utrecht University Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Veldhoven, Netherlands
- Not yet recruiting
- Maxima Medical Center
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Multiple Locations, Spain
- Not yet recruiting
- Multicentre: Valencia, Madrid, Barcelona
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Multiple Locations, United Kingdom
- Not yet recruiting
- Multicentre: Manchester, London, Liverpool, Glasgow, Cardiff, Sheffield
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Contact:
- INSIGHT study team
- Phone Number: +31205668668
- Email: insight@amc.nl
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Moderate or mild hemophilia A (FVIII:C 0.02-0.35 IU/mL) or hemophilia B (FIX:C 0.02-0.35 IU/mL)
- Age from 12 up to and including 55 years
Exclusion Criteria:
- Other clotting disorder
- Participation in another trial with an investigational product
- Comorbidity affecting the musculoskeletal status
- Clinically relevant inhibitor status at present or in the past
- Hemophilia B Leyden
- Use of anticoagulants
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
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Cohort study population
For the main cohort study, we will include 500 patients with moderate or mild hemophilia A and 500 patients with moderate or mild hemophilia B.
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Blood withdrawal.
Online questionnaire about the bleeds that patients experienced in the past.
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Sub study population
A subset of 200 patients of the cohort study population will be investigated in more detail by longitudinal data collection.
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Blood withdrawal.
MRI imaging of joints.
Physical examination of joint status.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Bleeding phenotype
Time Frame: Retrospective 10 years
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Annual bleeding rate, annual major bleeding rate, annual spontaneous joint bleeding rate, annual joint bleeding rate
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Retrospective 10 years
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Collaborators and Investigators
Investigators
- Principal Investigator: Karin Fijnvandraat, Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ANTICIPATED)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- NL61564.018.17
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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