The Effect of Vitamin D on Bone Accretion and Turn-Over in Young Girls

January 29, 2008 updated by: University of Copenhagen

Adolescent Girls-Impact of Vitamin D on Bone Accretion Work Package 1 (Danish Part) of OPTIFORD (Towards A Strategy for Optimal Vitamin D Fortification)

Objectives To evaluate the effect of increased vitamin D intake on vitamin D status, bone mass and bone turnover in young girls aged 12-13.

More specifically the effects on the following parameters will be assessed:

  • Vitamin D metabolites.
  • Parathyroid hormone.
  • Bone turnover.
  • Bone mineral accretion.
  • Serum calcium and phosphate.
  • Renal handling of calcium and phosphate.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This work package will consist of a randomised double blind one-year vitamin D supplementation study. Primary effect parameter is change in bone mineral content and therefore study duration will be one year. A total of 225 subjects, 75 in each of the three groups: one control and two intervention groups, will be included Two dosages of supplementation will be used: 5 µg per day and 10 µg per day.

Study Type

Interventional

Enrollment

225

Phase

  • Not Applicable

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

  • Denmark
      • Frederiksberg, Denmark, DK 1958
        • Department of Human Nutrition, The Royal Veterinary and Agricultural 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

10 years to 11 years (Child)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Girls born in Denmark with Danish citizenship aged 10.0-11.0 years living in the municipals of Copenhagen and Frederiksberg

Exclusion Criteria:

  • Any chronical disease with influence on bone mass or turnover
  • Intake of drugs with influence on bone mass or turnover
  • Intake of calcium or vitamin D other than the intervention

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: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Vitamin D level (status) measured as s-25 hydroxy vitamin D at baseline, after half a year and one year.
Bone accretion measured by DXA. Measurement at baseline and after one year.
Bone turnover measured at baseline, half a year and one year

Collaborators and Investigators

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

Sponsor

University of Copenhagen

Collaborators

Seventh Framework Programme

Investigators

  • Principal Investigator: Christian Mølgaard, MD, PhD, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

January 1, 2001

Study Completion

December 1, 2003

Study Registration Dates

First Submitted

December 20, 2005

First Submitted That Met QC Criteria

December 20, 2005

First Posted (Estimate)

December 21, 2005

Study Record Updates

Last Update Posted (Estimate)

January 30, 2008

Last Update Submitted That Met QC Criteria

January 29, 2008

Last Verified

January 1, 2008

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • QLK1-CT-2000-00623

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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