Vitamin D to Slow Progression of Knee Osteoarthritis
Public ClinicalTrials.gov record NCT00306774. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Trial of Vitamin D to Reduce the Progression of Knee Osteoarthritis: A Double-Blind, Placebo-Controlled Once Daily Dosing Regimen
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Knee osteoarthritis (OA) is a common and disabling health problem in older adults and for which there is no cure. The purpose of this study is to determine the effects of vitamin D on knee OA symptoms and physical function in adults aged 45 years and older.
Study identification
- NCT ID
- NCT00306774
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 146 participants
Conditions and interventions
Conditions
Interventions
- Vitamin D (cholecalciferol) Dietary Supplement
- Placebo Dietary Supplement
Dietary Supplement
Eligibility (public fields only)
- Age range
- 45 Years to 90 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Feb 28, 2006
- Primary completion
- May 31, 2009
- Completion
- May 31, 2009
- Last update posted
- Sep 22, 2011
2006 – 2009
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Tufts Medical Center, Division of Rheumatology | Boston | Massachusetts | 02111 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00306774, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Sep 22, 2011 · Synced Sep 8, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00306774 live on ClinicalTrials.gov.