Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial.
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|ClinicalTrials.gov Identifier: NCT00882505|
Recruitment Status : Completed
First Posted : April 16, 2009
Last Update Posted : December 2, 2021
|Condition or disease||Intervention/treatment||Phase|
|Vitamin D Deficiency||Dietary Supplement: vitamin D Other: Placebo||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||67 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Double (Participant, Investigator)|
|Official Title:||Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial.|
|Study Start Date :||April 2009|
|Actual Primary Completion Date :||August 2010|
|Actual Study Completion Date :||August 2010|
Experimental: Vitamin D supplement
Receive vitamin D supplements.
Dietary Supplement: vitamin D
Subject will receive vitamin d supplements
Placebo Comparator: Placebo
Receive placebo pills
Subject will receive a placebo.
No Intervention: Tanning bed user
Regular tanning bed users will be assessed for their vitamin D levels.
- For the randomized controlled trial, the primary outcome measure is comparison of the change in vitamin D levels in the vitamin D supplementation group and the placebo group. [ Time Frame: 3 months ]
- For the comparative study, the primary outcome measure is comparison of the vitamin D level for tanning bed users compared to the level for non-tanning bed users. [ Time Frame: 3 months ]
- The secondary outcome measures include evaluation of changes in other laboratory parameters associated with change in vitamin D level. [ Time Frame: 3 months ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00882505
|United States, Illinois|
|Northwestern University Feinberg School of Medicine, Department of Dermatology|
|Chicago, Illinois, United States, 60611|
|Principal Investigator:||Murad Alam, MD||Northwestern University|