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NCT00346333 · ClinicalTrials.gov registry record · Phase 3
Clinical Trial of Lutein for Patients With Retinitis Pigmentosa Receiving Vitamin A
A Phase 3 study, sponsored by National Eye Institute (NEI).
- Completed
- Registry status
- Phase 3
- Development phase
- 240
- Enrollment target
NCT00346333: Completed Phase 3 study, sponsored by National Eye Institute (NEI).
NCT00346333 is a Phase 3 study that has completed, run by National Eye Institute (NEI). The registered enrollment target is 240 participants, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (69% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00346333, a Phase 3 study, has completed, sponsored by National Eye Institute (NEI).
- COMPLETED
- Registry status
- Phase 3
- Development phase
- 240 participants
- Enrollment target
Study Summary
The purpose of this trial is to determine whether lutein in addition to vitamin A will slow the course of retinitis pigmentosa.
Primary Outcome
Sum of visual field sensitivity readings in decibel(dB) to a size V target out to the 30 degree meridian in each direction of the visual field. The value presented represents annual change in dB over 4 years.
Interventions
- DRUG Lutein
- DIETARY_SUPPLEMENT Cornstarch control
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 240 participants |
| Start Date | 2003-07 |
| Est. Completion | 2008-12 |
| Phase | Phase 3 |
What the finished NCT00346333 record still lists
NCT00346333 is an interventional study that assigns participants to a tested intervention. The registered 240 participants enrollment target is mid-sized for trials with a published cap, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (69% lower).
The record links to 0 conditions, and to 2 interventions - of which Lutein is the first listed.
NCT00346333 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00346333 about?
NCT00346333 is a clinical study titled "Clinical Trial of Lutein for Patients With Retinitis Pigmentosa Receiving Vitamin A". The purpose of this trial is to determine whether lutein in addition to vitamin A will slow the course of retinitis pigmentosa.
What is the current status of trial NCT00346333?
This trial is currently completed. It is a Phase 3 study. The enrollment target is 240 participants. The study started on 2003-07. Estimated completion is 2008-12.
What interventions are being tested in trial NCT00346333?
The interventions under investigation include: Lutein (DRUG), Cornstarch control (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT00346333?
This trial is sponsored by National Eye Institute (NEI), which has 221 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00346333's enrollment target sits among peer trials
240 1273rd of 2000 higher than 710 of 2,000 other Phase 3 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 3 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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