Vitamin D Status and Supplementation in Athletes (D-status)

December 12, 2014 updated by: Wageningen University

Vitamin D Status and Supplementation in Elite Athletes

The objectives of this study are 1) to assess the prevalence of vitamin D deficiency in a group of sub elite athletes and 2) to identify seasonal changes in vitamin D status and the effect that supplementation may have during the course of a year.

The study is a double blinded parallel study design.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Study population: 175 elite/ sub elite athletes, male and female, aged 18-60y, from a variety of sport disciplines

Study Type

Interventional

Enrollment (Actual)

153

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Netherlands
      • Wageningen, Netherlands
        • Wageningen University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • athletes
  • 19-60y

Exclusion Criteria:

  • subjects who take vitamin D supplements

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Vitamin D dose 1
Dietary supplement: vitamin D
Experimental: Vitamin D dose 2
Dietary supplement: vitamin D
Experimental: Vitamin D dose 3
Dietary supplement: vitamin D
No Intervention: observational
No dose

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change in serum 25(OH)D
Time Frame: Every 3 months during one year
Every 3 months during one year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Wageningen University

Investigators

  • Principal Investigator: Lisette de Groot, Prof. Dr., Wageningen University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2012

Primary Completion (Actual)

April 1, 2014

Study Completion (Actual)

April 1, 2014

Study Registration Dates

First Submitted

September 10, 2013

First Submitted That Met QC Criteria

December 5, 2013

First Posted (Estimate)

December 11, 2013

Study Record Updates

Last Update Posted (Estimate)

December 15, 2014

Last Update Submitted That Met QC Criteria

December 12, 2014

Last Verified

December 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • D-status

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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