NCT00033826

Brief Summary

Vitamin D is a fat soluble vitamin that has important effects on calcium (including absorption of calcium from the diet) and bone metabolism. Vitamin D is known to be stored in fat tissue, and it is also present in the circulation. The purpose of this study is to investigate the relationship between levels of vitamin D in fat tissue and in blood.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
41

participants targeted

Target at P25-P50 for all trials

Timeline
Completed

Started Apr 2002

Longer than P75 for all trials

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

April 1, 2002

Completed
9 days until next milestone

First Submitted

Initial submission to the registry

April 10, 2002

Completed
1 day until next milestone

First Posted

Study publicly available on registry

April 11, 2002

Completed
5.4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

September 1, 2007

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

September 1, 2007

Completed
Last Updated

May 24, 2013

Status Verified

May 1, 2013

Enrollment Period

5.4 years

First QC Date

April 10, 2002

Last Update Submit

May 23, 2013

Conditions

Vitamin DAdipose Tissue

Keywords

Vitamin DAdipose tissueMetabolism

Eligibility Criteria

Age18 Years - 65 Years
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

patients from Obesity Clinic

You may qualify if:

  • Obese patients referred for gastric bypass surgery

You may not qualify if:

  • Patients must not be taking bile acid-sequestering medications or anti-seizure medications

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Tufts-New England Medical Center

Boston, Massachusetts, 02111, United States

Location

Study Officials

  • Miriam Blum, MD

    Jean Mayer USDA Human Nutrition Center on Aging at Tufts University

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
observational
Observational Model
CASE ONLY
Time Perspective
CROSS SECTIONAL
Sponsor Type
OTHER

Study Record Dates

First Submitted

April 10, 2002

First Posted

April 11, 2002

Study Start

April 1, 2002

Primary Completion

September 1, 2007

Study Completion

September 1, 2007

Last Updated

May 24, 2013

Record last verified: 2013-05

Locations

US(1)