Impact of Work Environment Absent of Natural Light on Vitamin D Levels
|ClinicalTrials.gov Identifier: NCT01385085|
Recruitment Status : Unknown
Verified June 2011 by Medical Corps, Israel Defense Force.
Recruitment status was: Not yet recruiting
First Posted : June 29, 2011
Last Update Posted : June 29, 2011
Three types of workers exposed to different levels of natural sunlight will be tested for Vitamin D blood level, PTH, Ca, P, albumin and alkaline phosphatase.
In addition, each tested worker will be asked to fill a questionnaire for demographic, medical and personal habit information.
|Condition or disease|
|Vitamin D Deficiency|
|Study Type :||Observational|
|Estimated Enrollment :||300 participants|
|Official Title:||Impact of Work Environment Absent of Natural Light on Vitamin D Levels|
|Study Start Date :||November 2011|
No natural sunlight
one group works in a basement with no natural sunlight
Low level of Natural Sunlight
the second group work in offices with unopenable windows.
High level of Natural Sunlight
The third group works outdoors.