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Trial registered on ANZCTR
Registration number
ACTRN12613000772741
Ethics application status
Approved
Date submitted
9/07/2013
Date registered
10/07/2013
Date last updated
27/06/2016
Type of registration
Retrospectively registered
Titles & IDs
Public title
Effect of sodium and potassium supplementation on blood vessel function
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Scientific title
Effect of sodium and potassium supplementation on blood vessel function in healthy adults
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Secondary ID [1]
282804
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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:
Cardiovascular disease risk
289575
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Condition category
Condition code
Cardiovascular
289906
289906
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0
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Diseases of the vasculature and circulation including the lymphatic system
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Diet and Nutrition
289907
289907
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0
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Other diet and nutrition disorders
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Arm 1) High potassium, high sodium meal (38mmol potassium; 65mmol sodium)
Arm 2) Low potassium, high sodium meal (3.1mmol potassium; 65mmol sodium)
Each meal is consumed within 5minutes and there is a minimum 7day washout between visits
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Intervention code [1]
287487
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Prevention
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Comparator / control treatment
Arm 3) low potassium, low sodium meal (3.1mmol potassium; 5.5mmol sodium)
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Control group
Active
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Outcomes
Primary outcome [1]
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Edonthelial function as assessed by flow mediated dilatation
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Assessment method [1]
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Timepoint [1]
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2hours post meal
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Secondary outcome [1]
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Carotid-femoral pulse wave velocity measured using Sphygmo-CorEXCEL
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Assessment method [1]
303674
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Timepoint [1]
303674
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2hours post meal
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Secondary outcome [2]
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Augmentation index measured by pulse wave analysis using Sphygmo-CorEXCEL
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Assessment method [2]
303675
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Timepoint [2]
303675
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2hours post meal
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Secondary outcome [3]
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Blood pressure using Sphygmo-CorEXCEL
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Assessment method [3]
303676
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Timepoint [3]
303676
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2hours post meal
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Eligibility
Key inclusion criteria
18-70yr
BMI greather than 18kg/m2 and less than 30kg/m2
SBP <90mmHg DBP<130mmHg
weight stable for 6mo
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Minimum age
18
Years
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Maximum age
70
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
Use of antihypertensive medication, systemic steroids, folate supplementation or non-steroidal antiinflammatory
drugs
Metabolic disease such as liver or kidney disease
Treated hypertension
Previous clinical cardiovascular disease
Unable to comprehend protocol
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Study design
Purpose of the study
Prevention
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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)
Subjects contact researchers following advertisement, undergo telephone screening and are allocated to treatment order on arrival for first visit
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Subjects are allocated treatment order by an online random sequence number generator by a person independent of the study
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
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Intervention assignment
Crossover
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Other design features
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Phase
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
Based on power calculations from our previous study, with 80% power, p<0.05 to detect a minimum change in FMD of 1.3% absolute, 40 people were required in a cross over study.
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Recruitment
Recruitment status
Completed
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Date of first participant enrolment
Anticipated
9/07/2013
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Actual
9/07/2013
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Date of last participant enrolment
Anticipated
9/07/2014
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Actual
16/05/2014
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Date of last data collection
Anticipated
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Actual
30/05/2014
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Sample size
Target
40
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Accrual to date
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Final
39
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Recruitment in Australia
Recruitment state(s)
SA
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Funding & Sponsors
Funding source category [1]
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University
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Name [1]
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University of South Australia
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Address [1]
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North Terrace
Adelaide,
South Australia 5000
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Country [1]
287582
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Australia
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Primary sponsor type
University
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Name
University of South Australia
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Address
North Terrace
Adelaide,
South Australia 5000
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Country
Australia
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Secondary sponsor category [1]
286330
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None
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Name [1]
286330
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Address [1]
286330
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Country [1]
286330
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
289555
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University of South Australia Human Research Ethics Committee
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Ethics committee address [1]
289555
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North Terrace
Adelaide,
South Australia 5000
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Ethics committee country [1]
289555
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Australia
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Date submitted for ethics approval [1]
289555
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10/05/2013
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Approval date [1]
289555
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27/06/2013
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Ethics approval number [1]
289555
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0000031547
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Summary
Brief summary
The aim of this study is determine the effect of sodium to potassium ratio on postprandial endothelial function in healthy subjects. We speculate that a low sodium to potassium ratio improves postprandial endothelial function compared to high sodium to potassium ratio.
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Trial website
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Trial related presentations / publications
No citations to date
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Public notes
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Contacts
Principal investigator
Name
41314
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A/Prof Jennifer Keogh
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Address
41314
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University of South Australia
City East Campus,
North Terrace,
Adelaide
South Australia 5000
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Country
41314
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Australia
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Phone
41314
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+61 8 8302 2579
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Fax
41314
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Email
41314
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[email protected]
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Contact person for public queries
Name
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A/Prof Jennifer Keogh
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Address
41315
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University of South Australia
City East Campus,
North Terrace,
Adelaide
South Australia 5000
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Country
41315
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Australia
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Phone
41315
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+61 8 8302 2579
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Fax
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Email
41315
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[email protected]
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Contact person for scientific queries
Name
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A/Prof Jennifer Keogh
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Address
41316
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University of South Australia
City East Campus,
North Terrace,
Adelaide
South Australia 5000
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Country
41316
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Australia
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Phone
41316
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+61 8 8302 2579
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Fax
41316
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Email
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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
Effect of sodium and potassium supplementation on vascular and endothelial function: A randomized controlled trial.
2015
https://dx.doi.org/10.3945/ajcn.114.105197
N.B. These documents automatically identified may not have been verified by the study sponsor.
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