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NCT01747447 · ClinicalTrials.gov registry record · NA
VITamin D and OmegA-3 TriaL: Effects on Bone Structure and Architecture (VITAL)
A NA study, sponsored by Brigham and Women's Hospital.
- Completed
- Registry status
- NA
- Development phase
- 771
- Enrollment target
NCT01747447: Completed NA study, sponsored by Brigham and Women's Hospital.
NCT01747447 is a NA study that has completed, run by Brigham and Women's Hospital. The registered enrollment target is 771 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (45% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT01747447, a NA study, has completed, sponsored by Brigham and Women's Hospital.
- COMPLETED
- Registry status
- NA
- Development phase
- 771 participants
- Enrollment target
Study Summary
The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is a randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or fish oil (1 gram of omega-3 fatty acids) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses. This ancillary study is being conducted among a sub-cohort of 771 participants in VITAL and will test the efficacy and safety of high-dose vitamin D supplementation vs. placebo on skeletal health and body composition.
Primary Outcome
To determine whether vitamin D and/or omega-3 supplementation produces small increases or reduces bone loss in spine, hip, and total body areal bone density, as assessed by DXA. Reported values are rounded up.
Interventions
- DIETARY_SUPPLEMENT Vitamin D3
- DIETARY_SUPPLEMENT Vitamin D3 placebo
- DIETARY_SUPPLEMENT Fish oil placebo
- DIETARY_SUPPLEMENT omega-3 fatty acids (fish oil)
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 771 participants |
| Start Date | 2012-08 |
| Est. Completion | 2023-08-02 |
| Phase | NA |
What the finished NCT01747447 record still lists
NCT01747447 is an interventional study that assigns participants to a tested intervention. The registered 771 participants enrollment target is mid-sized for trials with a published cap, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (45% lower).
The record links to 0 conditions, and to 4 interventions - of which Vitamin D3 is the first listed.
NCT01747447 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT01747447 about?
NCT01747447 is a clinical study titled "VITamin D and OmegA-3 TriaL: Effects on Bone Structure and Architecture (VITAL)". The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is a randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or fish oil (1 gram of omega-3 fatty acids) reduces the risk of developing cancer, heart disease, and strok...
What is the current status of trial NCT01747447?
This trial is currently completed. It is a NA study. The enrollment target is 771 participants. The study started on 2012-08. Estimated completion is 2023-08-02.
What interventions are being tested in trial NCT01747447?
The interventions under investigation include: Vitamin D3 (DIETARY_SUPPLEMENT), Vitamin D3 placebo (DIETARY_SUPPLEMENT), Fish oil placebo (DIETARY_SUPPLEMENT), omega-3 fatty acids (fish oil) (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT01747447?
This trial is sponsored by Brigham and Women's Hospital, which has 937 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT01747447's enrollment target sits among peer trials
771 143rd of 2000 higher than 1,858 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA 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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