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Trial registered on ANZCTR
Registration number
ACTRN12615000741583
Ethics application status
Approved
Date submitted
6/07/2015
Date registered
17/07/2015
Date last updated
12/07/2018
Type of registration
Prospectively registered
Titles & IDs
Public title
Tart cherry concentrate in gout: a dose ranging study
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Scientific title
Determining the effects of tart cherry concentrate on gout flares and serum urate in patients with gout
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Secondary ID [1]
287043
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Nil
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Gout
295517
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Condition category
Condition code
Musculoskeletal
295786
295786
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0
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Other muscular and skeletal disorders
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Inflammatory and Immune System
295843
295843
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0
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Other inflammatory or immune system disorders
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Participants will receive tart cherry concentrate as liquid at one of the following doses for 28 days: 1/2tbsp twice daily, 1 tbsp twice daily, 1.5tbsp twice daily or 2 tbsp twice daily all added in 250mls water and drunk.
Adherence will be measured by self-report, empty bottle return and measurement of anthocyanins in plasma and urine
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Intervention code [1]
292260
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Treatment: Other
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Comparator / control treatment
2 drops of tart cherry concentrate as a liquid in 250mls water drunk twice daily
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Control group
Dose comparison
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Outcomes
Primary outcome [1]
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The optimal dose of tart cherry concentrate to reduce serum urate
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Assessment method [1]
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Timepoint [1]
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28 days
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Secondary outcome [1]
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Patient adherence with tart cherry concentrate as assessed by self-report, empty bottle return and plasma and urine anthocyanin concentrations
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Assessment method [1]
315689
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Timepoint [1]
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28 days
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Secondary outcome [2]
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Effect of tart cherry concentrate on gout flares as assessed by self-report flare diary.
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Assessment method [2]
315690
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Timepoint [2]
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28 days
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Eligibility
Key inclusion criteria
1. Gout as defined by American Rheumatism Association Criteria
2. Serum urate >0.36mmol/l
3. Willing and able to provide informed consent
4. Willing and able to adhere to the study protocol
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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
1. Type 1 diabetes
2. Creatinine clearance <50mls/min
3. Diuretic use
4. allergic to cherries or cherry concentrate
5. Other serious medical conditions that preclude involvement
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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
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Parallel
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Date of first participant enrolment
Anticipated
1/02/2016
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Actual
29/02/2016
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Date of last participant enrolment
Anticipated
18/12/2017
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Actual
26/02/2018
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Date of last data collection
Anticipated
26/01/2018
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Actual
26/03/2018
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Sample size
Target
50
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Accrual to date
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Final
50
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Recruitment outside Australia
Country [1]
7020
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New Zealand
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State/province [1]
7020
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Christchurch
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Funding & Sponsors
Funding source category [1]
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Government body
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Name [1]
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Health Research Council of New Zealand
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Address [1]
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P.O. Box 5541 Wellesley Street
Auckland 1411
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Country [1]
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New Zealand
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Primary sponsor type
University
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Name
University of Otago
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Address
P.O.Box 4345
Christchurch 8014
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Country
New Zealand
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Secondary sponsor category [1]
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None
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Name [1]
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Address [1]
290269
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Country [1]
290269
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
293129
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Northern B Health and Disability Ethics Committee of New Zealand
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Ethics committee address [1]
293129
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C/- MEDSAFE, Level 6, Deloitte House
10 Brandon Street
PO Box 5013
Wellington 6145
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Ethics committee country [1]
293129
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New Zealand
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Date submitted for ethics approval [1]
293129
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20/07/2015
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Approval date [1]
293129
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15/09/2015
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Ethics approval number [1]
293129
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15/NTB/133
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Summary
Brief summary
Gout is the most common form of arthritis in men >40 years of age. The primary biochemical abnormality is elevated serum urate (hyperuricaemia). Hyperuricaemia (serum urate >0.42mmol/L) results from either over production or under excretion of urate. When supersaturation levels are reached, uric acid crystals form and deposit in joints and periarticular tissues, where they cause damage through local mechanical pressure and acute/chronic inflammation. Over time, repeated attacks of gout lead to cartilage damage, bone erosion and permanent disability. The aim of gout management is to reduce serum urate levels to <0.36mmol/L. If serum urate concentrations are consistently maintained at or below this level gouty attacks subside and tophi reduce in size and number . Nutritional supplementation with tart cherry concentrate has been suggested based on previous small studies that revealed a reduction in gout flares in patients consuming large amounts of cherries or tart cherry concentrate. These data are limited to observational studies and the only clinical trials are in small numbers of patients. Thus there is a need for prospective clinical trials of the effects of tart cherry concentrate in patients with gout. The aim of this study is to determine the most effective dose of tart cherry concentrate for use in a large clinical trial.
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Trial website
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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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Prof Lisa Stamp
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Address
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Department of Medicine
University of Otago, Christchurch
P.O. Box 4345
Christchurch 8014
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Country
58606
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New Zealand
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Phone
58606
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+64 - 3-364- 0253
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Fax
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Email
58606
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[email protected]
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Contact person for public queries
Name
58607
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Prof Lisa Stamp
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Address
58607
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Department of Medicine
University of Otago, Christchurch
P.O. Box 4345
Christchurch 8014
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Country
58607
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New Zealand
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Phone
58607
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+64 -3- 364- 0253
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Fax
58607
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Email
58607
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[email protected]
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Contact person for scientific queries
Name
58608
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Prof Lisa Stamp
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Address
58608
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Department of Medicine
University of Otago, Christchurch
P.O. Box 4345
Christchurch 8014
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Country
58608
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New Zealand
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Phone
58608
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+64 -3- 364- 0253
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Fax
58608
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Email
58608
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
Source
Title
Year of Publication
DOI
Embase
Lack of effect of tart cherry concentrate dose on serum urate in people with gout.
2020
https://dx.doi.org/10.1093/rheumatology/kez606
N.B. These documents automatically identified may not have been verified by the study sponsor.
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