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Impact of Work Environment Absent of Natural Light on Vitamin D Levels

The recruitment status of this study is unknown because the information has not been verified recently.
Verified June 2011 by Medical Corps, Israel Defense Force.
Recruitment status was  Not yet recruiting
Sponsor:
Information provided by:
Medical Corps, Israel Defense Force
ClinicalTrials.gov Identifier:
NCT01385085
First received: June 28, 2011
Last updated: NA
Last verified: June 2011
History: No changes posted
  Purpose

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
Vitamin D Deficiency

Study Type: Observational
Study Design: Observational Model: Case-Crossover
Time Perspective: Cross-Sectional
Official Title: Impact of Work Environment Absent of Natural Light on Vitamin D Levels

Resource links provided by NLM:


Further study details as provided by Medical Corps, Israel Defense Force:

Estimated Enrollment: 300
Study Start Date: November 2011
Groups/Cohorts
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.

  Eligibility

Ages Eligible for Study:   18 Years to 45 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population

People employed in three types of natural sunlight exposure.

Criteria

Inclusion Criteria:

  • people employed in their current work place at least 6 months,

Exclusion Criteria:

  • people who consume food additives containing Vitamin D.
  • people who have a chronic illness which harms the Vitamin D absorption, such as Celiac, chronic Pancreatitis, Cystic Fibrosis and IBS.
  • people who have a chronic illness which harms Vitamin D metabolism, such as chronic hepatitis, kidney insufficiency and Nephrotic Syndrome.
  • pregnant women.
  • people who require prescribed medicine like steroids, anti-convulsion, and HIV treatments.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

No Contacts or Locations Provided
  More Information

No publications provided

Responsible Party: Head of Industrial Hygiene, Occupational Medicine and Medical Classification Branch , IDF
ClinicalTrials.gov Identifier: NCT01385085     History of Changes
Other Study ID Numbers: 922-2010-IDF-CTIL
Study First Received: June 28, 2011
Last Updated: June 28, 2011
Health Authority: Israel: Israeli Health Ministry Pharmaceutical Administration

Keywords provided by Medical Corps, Israel Defense Force:
Vitamin D
Sunlight
Deficiency

Additional relevant MeSH terms:
Vitamin D Deficiency
Avitaminosis
Deficiency Diseases
Malnutrition
Nutrition Disorders
Vitamin D
Vitamins
Bone Density Conservation Agents
Growth Substances
Micronutrients
Pharmacologic Actions
Physiological Effects of Drugs

ClinicalTrials.gov processed this record on November 27, 2014