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NCT02636348 · ClinicalTrials.gov registry record · NA
Evaluation of Calcium and Vitamin D Supplementation During Marine Corps Training
A NA study, sponsored by United States Army Research Institute of Environmental Medicine.
- Completed
- Registry status
- NA
- Development phase
- 380
- Enrollment target
NCT02636348: Completed NA study, sponsored by United States Army Research Institute of Environmental Medicine.
NCT02636348 is a NA study that has completed, run by United States Army Research Institute of Environmental Medicine. The registered enrollment target is 380 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (73% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT02636348, a NA study, has completed, sponsored by United States Army Research Institute of Environmental Medicine.
- COMPLETED
- Registry status
- NA
- Development phase
- 380 participants
- Enrollment target
Study Summary
The primary objective of this randomized, double-blind, placebo-controlled trial is to determine the efficacy and effectiveness of Ca and vitamin D supplementation provided daily throughout Marine Corps recruit training on maintenance of PTH and indices of bone strength in Marine Corps recruits. The investigators hypothesize that Ca+D will prevent elevations in PTH and result in greater increases in indices of bone strength compared to placebo.
Primary Outcome
Effect of calcium/vitamin D on the following serum biomarkers: 25(OH)D (ng/ml), parathyroid hormone (PTH) (pg/ml), C-telopeptide cross-links of type 1 collagen (CTX) (ng/ml), tartrate-resistant acid phosphatase (TRAP) (U/L), bone alkaline phosphatase (BAP) (ug/L), procollagen I N-terminal peptide (P1NP) (ug/L)
Interventions
- DIETARY_SUPPLEMENT Placebo
- DIETARY_SUPPLEMENT Calcium/Vitamin D
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 380 participants |
| Start Date | 2015-07 |
| Est. Completion | 2016-10 |
| Phase | NA |
What the finished NCT02636348 record still lists
NCT02636348 is an interventional study that assigns participants to a tested intervention. The registered 380 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 (73% lower).
The record links to 0 conditions, and to 2 interventions - of which Placebo is the first listed.
NCT02636348 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT02636348 about?
NCT02636348 is a clinical study titled "Evaluation of Calcium and Vitamin D Supplementation During Marine Corps Training". The primary objective of this randomized, double-blind, placebo-controlled trial is to determine the efficacy and effectiveness of Ca and vitamin D supplementation provided daily throughout Marine Corps recruit training on maintenance of PTH and indices of bone strength in Marine Corps recruits. The...
What is the current status of trial NCT02636348?
This trial is currently completed. It is a NA study. The enrollment target is 380 participants. The study started on 2015-07. Estimated completion is 2016-10.
What interventions are being tested in trial NCT02636348?
The interventions under investigation include: Placebo (DIETARY_SUPPLEMENT), Calcium/Vitamin D (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT02636348?
This trial is sponsored by United States Army Research Institute of Environmental Medicine, which has 59 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT02636348's enrollment target sits among peer trials
380 273rd of 2000 higher than 1,727 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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