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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT02896725
Registration number
NCT02896725
Ethics application status
Date submitted
29/08/2016
Date registered
12/09/2016
Titles & IDs
Public title
Wool-derived Keratin Dressings for Venous Leg Ulcers
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Scientific title
Keratin4VLU: A Randomised Controlled Trial of Wool-derived Keratin Dressings for Venous Leg Ulcers
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Secondary ID [1]
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U1111-1186-5202
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Secondary ID [2]
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Keratin4VLU
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Universal Trial Number (UTN)
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Trial acronym
Keratin4VLU
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Varicose Ulcer
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Condition category
Condition code
Cardiovascular
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Diseases of the vasculature and circulation including the lymphatic system
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Skin
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Other skin conditions
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Oral and Gastrointestinal
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0
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Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Devices - Keratin dressings
Treatment: Devices - Usual care dressings
Experimental: Keratin dressings - Wool-derived keratin matrix dressing applied with each change of the compression bandage until healing
Active comparator: Usual care dressings - Dressing chosen from study centres' formulary of non-medicated moist wound dressings applied with each change of the compression bandage until healing
Treatment: Devices: Keratin dressings
Wool-derived keratin matrix dressings applied with each change of the compression bandage until healing or the trial ends
Treatment: Devices: Usual care dressings
Dressings chosen from study centres' formulary of non-medicated moist wound dressings (non-adherent dressings, hydrogel, alginate, hydrofibre or polyurethane foam dressings) applied with each change of the compression bandage until healing or the trial ends
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Intervention code [1]
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Treatment: Devices
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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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Proportion of patients with complete healing of reference ulcer
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Assessment method [1]
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Timepoint [1]
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24 weeks
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Secondary outcome [1]
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Agreement between blinded and unblinded assessors on healing
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Assessment method [1]
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Timepoint [1]
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24 week outcome
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Secondary outcome [2]
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Time to complete healing of reference ulcer
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Assessment method [2]
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Timepoint [2]
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Until data collection completed two years after first participant is recruited
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Secondary outcome [3]
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Change in estimated reference ulcer area
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Assessment method [3]
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Estimated ulcer area will be derived measuring maximum width and length to determine area using formula for area of an ellipse. Such an approach is highly co-related (r=0.92) with more sophisticated measurement methods.
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Timepoint [3]
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24 weeks
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Secondary outcome [4]
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Change in health-related quality of life (generic)
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Assessment method [4]
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The RAND-36 questionnaire will be used for measurement of generic health-related quality of life
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Timepoint [4]
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24 weeks
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Secondary outcome [5]
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Change in health-related quality of life (generic)
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Assessment method [5]
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The EuroQuol-5D questionnaire will be used to generate utility values for cost-effectiveness modelling should that be undertaken
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Timepoint [5]
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24 weeks
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Secondary outcome [6]
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Change in health-related quality of life (disease-specific)
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Assessment method [6]
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The Charing Cross Venous Ulcer Questionnaire will be used for measurement of disease-specific health-related quality of life
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Timepoint [6]
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24 weeks
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Secondary outcome [7]
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Incidence of adverse events
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Assessment method [7]
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Timepoint [7]
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Until data collection completed two years after first participant is recruited
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Eligibility
Key inclusion criteria
* Clinical indications of venous leg ulceration
* Ankle Brachial Index = 0.7
* Able to tolerate compression therapy
* Ulcer area > 5cm2 and/or ulcer duration > 6 months
* Able to provide informed consent.
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
* Hypersensitivity to wool or wool alcohols
* Venous leg ulceration with exposed tendon or bone
* Infected venous leg ulcer at trial inception (eligible after infection resolved)
* Venous leg ulcer with critical bioburden at trial inception (eligible if resolved)
* History of rheumatoid arthritis or vasculitis
* Uncontrolled diabetes
* Severe liver, heart, or renal failure
* Severe peripheral arterial disease
* Suspected or diagnosed skin malignancy
* Other threat to safe participation.
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people assessing the outcomes
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Intervention assignment
Parallel
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Other design features
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Phase
NA
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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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
1/03/2017
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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
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Actual
30/09/2019
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Sample size
Target
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Accrual to date
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Final
143
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Recruitment in Australia
Recruitment state(s)
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Recruitment outside Australia
Country [1]
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New Zealand
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State/province [1]
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Auckland
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Funding & Sponsors
Primary sponsor type
Other
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Name
University of Auckland, New Zealand
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Address
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Country
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Other collaborator category [1]
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Other
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Name [1]
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Health Research Council, New Zealand
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Address [1]
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Country [1]
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Ethics approval
Ethics application status
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Summary
Brief summary
Venous leg ulcers (VLU) are the most common leg ulcer, can be painful, and limit work, lifestyles and activity, especially in older patients. Compression bandaging is the main treatment but there are few added treatments for patients with slow healing VLU. About 50% of patients with VLU may be slow healing. Research suggests using keratin dressings as well as using compression may help healing in patients with show healing VLU, but the current evidence is not enough to change clinical practice. The investigators will conduct a randomised controlled trial to test whether using keratin dressings is better than usual care for slow healing VLU.
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Trial website
https://clinicaltrials.gov/study/NCT02896725
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Trial related presentations / publications
Jull A, Wadham A, Bullen C, Parag V, Waters J. Wool-derived keratin dressings versus usual care dressings for treatment of slow-healing venous leg ulceration: study protocol for a randomised controlled trial (Keratin4VLU). BMJ Open. 2018 Feb 13;8(2):e020319. doi: 10.1136/bmjopen-2017-020319. Jull A, Wadham A, Bullen C, Parag V, Weller C, Waters J. Wool-derived keratin dressings versus usual care dressings for treatment of slow healing venous leg ulceration: a randomised controlled trial (Keratin4VLU). BMJ Open. 2020 Jul 20;10(7):e036476. doi: 10.1136/bmjopen-2019-036476.
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Public notes
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Contacts
Principal investigator
Name
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Andrew Jull, RN PhD
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Address
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National Institute for Health Innovation, University of Auckland
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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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Address
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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 scientific queries
Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
Yes
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What data in particular will be shared?
Anonymised individual participant data may be made available on request to the Principal Investigator
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When will data be available (start and end dates)?
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Available to whom?
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Available for what types of analyses?
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How or where can data be obtained?
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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/NCT02896725