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NCT00521729 · ClinicalTrials.gov registry record · NA
Metabolism and Thyroid Hormone Changes During Exposure to Cold Temperatures
A NA study, sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).
- Completed
- Registry status
- NA
- Development phase
- 160
- Enrollment target
NCT00521729: Completed NA study, sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).
NCT00521729 is a NA study that has completed, run by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). The registered enrollment target is 160 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (89% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00521729, a NA study, has completed, sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).
- COMPLETED
- Registry status
- NA
- Development phase
- 160 participants
- Enrollment target
Study Summary
This study will examine how body metabolism adjusts to small changes in environmental temperature and how it may be related to weight loss. Healthy, non-obese individuals between 18 and 60 years of age may be eligible for this study. The study consists of one screening visit and one 5-day admission to the NIH Clinical Center for the following procedures: Diet: Participants follow a proscribed diet consisting of 50% carbohydrates, 20% protein and 30% fat. DEXA scan to measure body fat. Subjects lie on a table above a source of X-rays while a very small dose of X-rays is passed through the body. Air displacement plethysmography (Bod-Pod) to study fat composition: Subjects sit in a small booth for 10 minutes wearing a swim suit and breathing normally through a tube. This test measures the person s weight and volume precisely. Metabolic room: Subjects stay 12 hours in a specialized room designed to measure the amount of oxygen breathed in and the amount of carbon dioxide breathed out. The room contains a private toilet and sink, treadmill, bed, desk, window, telephone and computer with television and internet access. While in this room, subjects undergo the following: * Continuous heart rate monitor: Subjects wear an EKG monitor to analyze heart rate variability. * Spontaneous movements: Subjects wear portable accelerometers at the hip and wrist to measure spontaneous physical movements. * Continuous temperature monitor: Subjects swallow a small capsule that transmits internal body temperature via miniature, wireless sensors. Adhesive patches placed on the skin monitor external body temperature. * Blood and urine collections: Subjects collect all of their urine during the 12 hours they are in the metabolic room. Blood samples are taken at specified intervals through a catheter that has been placed in a vein. * Microdialysis: A small needle is placed into fat tissue just under the skin on the abdomen. A solution containing a minimal amount of ethanol is infused and
Interventions
- PROCEDURE Exposure to Cold Temperature
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 160 participants |
| Start Date | 2007-08-24 |
| Est. Completion | 2018-06-26 |
| Phase | NA |
What the finished NCT00521729 record still lists
NCT00521729 is an interventional study that assigns participants to a tested intervention. The registered 160 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 (89% lower).
The record links to 0 conditions, and to 1 intervention - of which Exposure to Cold Temperature is the first listed.
NCT00521729 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00521729 about?
NCT00521729 is a clinical study titled "Metabolism and Thyroid Hormone Changes During Exposure to Cold Temperatures". This study will examine how body metabolism adjusts to small changes in environmental temperature and how it may be related to weight loss. Healthy, non-obese individuals between 18 and 60 years of age may be eligible for this study. The study consists of one screening visit and one 5-day admission...
What is the current status of trial NCT00521729?
This trial is currently completed. It is a NA study. The enrollment target is 160 participants. The study started on 2007-08-24. Estimated completion is 2018-06-26.
What interventions are being tested in trial NCT00521729?
The interventions under investigation include: Exposure to Cold Temperature (PROCEDURE).
Who is sponsoring clinical trial NCT00521729?
This trial is sponsored by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), which has 490 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00521729's enrollment target sits among peer trials
160 628th of 2000 higher than 1,347 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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