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Trial registered on ANZCTR
Registration number
ACTRN12607000642482
Ethics application status
Approved
Date submitted
13/12/2007
Date registered
17/12/2007
Date last updated
29/06/2012
Type of registration
Retrospectively registered
Titles & IDs
Public title
An investigation of the effect of vitamin D supplementation on insulin resistance and bone health in South Asian women
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Scientific title
The effect of vitamin D supplementation on insulin resistance and bone markers in South Asian women with hypovitaminosis D and raised insulin resistance (HOMA-IR)
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Universal Trial Number (UTN)
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Trial acronym
Surya Study
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Insulin resistance
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bone mineral density
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bone turnover
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Condition category
Condition code
Diet and Nutrition
2744
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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
Vitamin D (25(OH)D3) supplement, 4000 international units (IU) per day in the form of an oral capsule, for 6 months. Vitamin D is synthesised in the skin in the presence of sunlight, but can also be taken as a dietary supplement.
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Intervention code [1]
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Treatment: Other
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Comparator / control treatment
Placebo. The placebo capsule is of identical appearance as the active, but without the vitamin D content. It is taken for the same duration i.e. daily for 6 months
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Control group
Placebo
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Outcomes
Primary outcome [1]
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Insulin resistance as measured by Homeostatis Model Assessment of Insulin Resistance (HOMA-IR)
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Assessment method [1]
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Timepoint [1]
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Baseline, 3 months and 6 months
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Secondary outcome [1]
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Collagen C-telopeptide (CTX)/osteocalcin ratios measured in serum from fasting blood samples
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Assessment method [1]
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Timepoint [1]
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Baseline, 3 months and 6 months
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Eligibility
Key inclusion criteria
Female, South Asian
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Minimum age
20
Years
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Maximum age
No limit
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Sex
Females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
Vitamin D supplements >1000IU per day, medicated for diabetes, chronic kidney disease
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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)
Randomisation and allocation into pairs was performed by the manufacturer using "NQuery" software. Randomisation and allocation was fully concealed from the researcher.
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Subjects are paired according to (1) age and (2) BMI. A coin is then tossed to allocate either the A or B bottle of a pair of bottles to the first (alphabetical) name of the pair.
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Masking / blinding
Blinded (masking 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
Phase 1 / Phase 2
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Active, not recruiting
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Date of first participant enrolment
Anticipated
15/02/2007
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Actual
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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
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Sample size
Target
100
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Accrual to date
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Final
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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
Funding source category [1]
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Charities/Societies/Foundations
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Name [1]
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New Zealand Lottery Grants Board
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Address [1]
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Level 1
46 Waring Taylor Street
Wellington
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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
Massey University
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Address
Institute of Food, Nutrition and Human Health (IFNHH)
B22 Eastbourne Road,
Massey University
Albany
Auckland
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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]
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Country [1]
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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Massey University Human Ethics Committee - Southern A
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Ethics committee address [1]
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Office of the Assistant the VC
Massey University
Turitea Campus
Private Bag 11222
Palmerston North
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Ethics committee country [1]
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New Zealand
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Date submitted for ethics approval [1]
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20/11/2006
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Approval date [1]
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20/12/2006
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Ethics approval number [1]
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06/67
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Summary
Brief summary
People of South Asian origin are anecdotally thought to be deficient in vitamin D, partly due to skin colour and partly to other lifestyle/cultural reasons. They are also known to be at greater risk of developing type 2 diabetes than the general population. There is some evidence that vitamin D deficiency plays a role in the aetiology of diabetes. The aim of this trial is to test the hypotheses that insulin resistance will improve when vitamin D deficiency is addressed.
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Trial website
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Trial related presentations / publications
P R von Hurst, C Matthys, W Stonehouse, J Coad. Is Wasit circumference a useful indicator of markers of metabolic syndrome in South Asian women living in New Zealand? Presentation to International Diabetes Federation - West Pacific, Wellington April 2008
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Public notes
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Contacts
Principal investigator
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 public queries
Name
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Pamela von Hurst
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Address
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Institute of Food, Nutrition and Human Health (IFNHH)
B22 Eastbourne Road,
Massey University
Albany
Auckland
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Country
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New Zealand
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Phone
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09 4140800 ext 41205
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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
Name
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Pamela von Hurst
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Address
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Institute of Food, Nutrition and Human Health (IFNHH)
B22 Eastbourne Road,
Massey University
Albany
Auckland
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Country
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New Zealand
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Phone
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09 4140800 ext 41205
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Fax
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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
Dimensions AI
Study Protocol – Metabolic syndrome, vitamin D and bone status in South Asian women living in Auckland, New Zealand: A randomised, placebo-controlled, double-blind vitamin D intervention
2008
https://doi.org/10.1186/1471-2458-8-267
Dimensions AI
Abstracts
2009
https://doi.org/10.1111/j.1747-0080.2009.01351.x
N.B. These documents automatically identified may not have been verified by the study sponsor.
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