Expired Study
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St. Louis, Missouri 63108


Vitamin D deficiency is common in the elderly and contributes to the increased incidence of falls, hip fracture and depression in this population. An unknown number of elderly have vitamin D resistance resulting in a functional vitamin D deficiency state. Because there are no simple procedures or blood tests that identify vitamin D resistance, its prevalence and contribution to disability in the elderly is unknown. Our inability to screen for this condition precludes our ability to initiate and monitor treatment. Previous studies indicate that fingernail thickness correlates with vitamin D status and may therefore provide a simple cost effective procedure to not only identify patients with vitamin D deficiency but also, those with vitamin D resistance. This procedure may also provide a way to monitor an individual's response to treatment. This study is designed to demonstrate the association between fingernail thickness and vitamin D status.


Inclusion Criteria: - females 25-75 years of age with no known bone disorders Exclusion Criteria: - history of vertebral fractures or nonvertebral fractures without trauma - prescription medications for prevention of osteoporosis (including vitamin D other than multivitamin and estrogen) - history of malignancy other than basal cell or squamous cell cancer of the skin - use of steroids or anticonvulsants in the 6 months prior to enrollment

Study is Available At:

Original ID:




Secondary ID:


Study Acronym:

Brief Title:

The Relationship Between Vitamin D, Fingernail Thickness and Bone Density

Official Title:

Overall Status:


Study Phase:

Phase 1



Minimum Age:

25 Years

Maximum Age:

75 Years

Quick Facts

Healthy Volunteers
Oversight Has DMC
Study Is FDA Regulated
Study Is Section 801
Has Expanded Access

Study Source:

National Center for Research Resources (NCRR)

Oversight Authority:

United States: Federal Government

Reasons Why Stopped:

Study Type:


Study Design:

Allocation: Randomized, Masking: Double-Blind, P

Number of Arms:


Number of Groups:


Total Enrollment:


Enrollment Type:

Study Dates

Verification Date:December 2003
Last Changed Date:June 23, 2005
First Received Date:September 7, 2000

Study Outcomes

There are no available Study Outcomes

Study Interventions

Intervention Type:Drug
Name:Vitamin D

Study Arms

There are no available Study Arms

Study Agencies

Agency Class:NIH
Agency Type:Lead Sponsor
Agency Name:National Center for Research Resources (NCRR)

Sample and Retention Information

There are no available Sample and Retention Information

Study References

There are no available Study References

Data Source: ClinicalTrials.gov

Date Processed: January 21, 2020

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