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NCT00571285 · ClinicalTrials.gov registry record · Phase 4
Clinical Effects of Vitamin D Repletion in Patients With Parkinson's Disease
A Phase 4 study, sponsored by Emory University.
- Terminated
- Registry status
- Phase 4
- Development phase
- 31
- Enrollment target
NCT00571285: Clinical Trial Phase 4 study, sponsored by Emory University.
NCT00571285 is a Phase 4 study that was terminated before completion, run by Emory University. The registered enrollment target is 31 participants, below the 518-participant average among 9,235 other Phase 4 trials with a reported enrollment target (94% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00571285, a Phase 4 study, was terminated before completion, sponsored by Emory University.
- TERMINATED
- Registry status
- Phase 4
- Development phase
- 31 participants
- Enrollment target
Study Summary
Retrospective review of records in the Emory Movement Disorders clinic suggests vitamin D deficiency occurs in over 80% of patients with Parkinson's Disease (PD), much more frequently than in internal medicine clinics. Laboratory studies have suggested vitamin D could play a role in the development of PD. In addition, low vitamin D levels have been associated with slower walking speeds, worse memory and thinking, and depression.
Interventions
- DIETARY_SUPPLEMENT Placebo
- DIETARY_SUPPLEMENT Vitamin D3
- DIETARY_SUPPLEMENT Vitamin D3 - high dose
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 31 participants |
| Start Date | 2007-06 |
| Est. Completion | 2015-09 |
| Phase | Phase 4 |
Why NCT00571285 stopped before completion
NCT00571285 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 31 participants, a relatively small participant target, below the 518-participant average among 9,235 other Phase 4 trials with a reported enrollment target (94% lower).
The record links to 0 conditions, and to 3 interventions - of which Placebo is the first listed.
NCT00571285 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00571285 about?
NCT00571285 is a clinical study titled "Clinical Effects of Vitamin D Repletion in Patients With Parkinson's Disease". Retrospective review of records in the Emory Movement Disorders clinic suggests vitamin D deficiency occurs in over 80% of patients with Parkinson's Disease (PD), much more frequently than in internal medicine clinics. Laboratory studies have suggested vitamin D could play a role in the development ...
What is the current status of trial NCT00571285?
This trial is currently terminated. It is a Phase 4 study. The enrollment target is 31 participants. The study started on 2007-06. Estimated completion is 2015-09.
What interventions are being tested in trial NCT00571285?
The interventions under investigation include: Placebo (DIETARY_SUPPLEMENT), Vitamin D3 (DIETARY_SUPPLEMENT), Vitamin D3 - high dose (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT00571285?
This trial is sponsored by Emory University, which has 1,208 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00571285's enrollment target sits among peer trials
31 1544th of 2000 higher than 449 of 2,000 other Phase 4 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 4 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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