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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT03623295
Registration number
NCT03623295
Ethics application status
Date submitted
6/08/2018
Date registered
9/08/2018
Titles & IDs
Public title
The Dynamic Interplay Between Bleeding Phenotype and Baseline Factor Level in Moderate and Mild Hemophilia A and B
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Scientific title
The Dynamic Interplay Between Bleeding Phenotype and Baseline Factor Level in Moderate and Mild Hemophilia A and B
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Secondary ID [1]
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NL61564.018.17
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Universal Trial Number (UTN)
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Trial acronym
DYNAMO
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Hemophilia
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Condition category
Condition code
Blood
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Clotting disorders
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Human Genetics and Inherited Disorders
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0
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Other human genetics and inherited disorders
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Intervention/exposure
Study type
Observational
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Patient registry
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Target follow-up duration
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Target follow-up type
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Description of intervention(s) / exposure
Other interventions - Blood sample
Other interventions - Questionnaire
Other interventions - MRI-imaging
Other interventions - Physical examination
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.
Sub study population - A subset of 200 patients of the cohort study population will be investigated in more detail by longitudinal data collection.
Other interventions: Blood sample
Blood withdrawal.
Other interventions: Questionnaire
Online questionnaire about the bleeds that patients experienced in the past.
Other interventions: MRI-imaging
MRI imaging of joints.
Other interventions: Physical examination
Physical examination of joint status.
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Intervention code [1]
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Other interventions
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Bleeding phenotype
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Assessment method [1]
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Annual bleeding rate, annual major bleeding rate, annual spontaneous joint bleeding rate, annual joint bleeding rate
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Timepoint [1]
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Retrospective 10 years
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Eligibility
Key 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
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Minimum age
12
Years
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Maximum age
55
Years
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Sex
Males
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Can healthy volunteers participate?
No
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Key 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
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Study design
Purpose
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Duration
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Selection
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Timing
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Statistical methods / analysis
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Recruitment
Recruitment status
UNKNOWN
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/01/2018
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
1/04/2022
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Actual
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Sample size
Target
1000
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Recruitment hospital [1]
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Royal Adelaide Hospital - Adelaide
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Recruitment postcode(s) [1]
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- Adelaide
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Recruitment outside Australia
Country [1]
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Austria
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State/province [1]
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Vienna
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Country [2]
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Belgium
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State/province [2]
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Multiple Locations
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Country [3]
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Canada
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State/province [3]
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Multiple Locations
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Country [4]
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Finland
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State/province [4]
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Helsinki
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Country [5]
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Germany
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State/province [5]
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Multiple Locations
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Country [6]
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Italy
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State/province [6]
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Multiple Locations
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Country [7]
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Netherlands
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State/province [7]
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Amsterdam
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Country [8]
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Netherlands
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State/province [8]
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Groningen
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Country [9]
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Netherlands
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State/province [9]
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Leiden
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Country [10]
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Netherlands
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State/province [10]
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Maastricht
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Country [11]
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Netherlands
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State/province [11]
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Nijmegen
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Country [12]
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Netherlands
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State/province [12]
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Rotterdam
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Country [13]
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Netherlands
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State/province [13]
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Utrecht
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Country [14]
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Netherlands
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State/province [14]
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Veldhoven
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Country [15]
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Spain
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State/province [15]
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Multiple Locations
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Country [16]
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United Kingdom
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State/province [16]
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Multiple Locations
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Funding & Sponsors
Primary sponsor type
Other
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Name
Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
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.
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Trial website
https://clinicaltrials.gov/study/NCT03623295
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Karin Fijnvandraat
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Address
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Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Anne-Fleur Zwagemaker
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Address
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Country
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Phone
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+31205668668
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results not provided in
https://clinicaltrials.gov/study/NCT03623295