This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Vitamin D Supplementations as Adjunct to Anti-Tuberculosis Drugs in Mongolia

This study has been completed.
Information provided by (Responsible Party):
Ganmaa Davaasambuu, Harvard School of Public Health Identifier:
First received: August 2, 2012
Last updated: July 29, 2014
Last verified: July 2014


That improving vitamin D status among TB patients will speed the pace of bacteriological cure, and will enhance immune responses to TB infection

Condition Intervention
Vitamin D Supplements Tuberculosis Sputum Cytokines Immunity Dietary Supplement: Vitamin D

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: Vitamin D Supplementations as Adjunct to Anti-Tuberculosis Drugs in Mongolia

Resource links provided by NLM:

Further study details as provided by Ganmaa Davaasambuu, Harvard School of Public Health:

Primary Outcome Measures:
  • The primary endpoint will be time to sputum culture conversion from positive to negative. [ Time Frame: Eight weeks ]

Estimated Enrollment: 350
Study Start Date: October 2012
Study Completion Date: July 2014
Primary Completion Date: May 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Vitamin D group
Vitamin D supplement by Tishcon
Dietary Supplement: Vitamin D
Placebo Comparator: Control group
Identically appearing capsules
Dietary Supplement: Vitamin D

Detailed Description:

Tuberculosis (TB) will be the world's largest single cause of death from infection for the 30-year period between 1990 and 2020. More than 95% of TB cases, and deaths due to TB, occur in developing countries. Mongolia is one of the countries with the highest tuberculosis burdens in the Western Pacific region. In addition, vitamin D deficiency is endemic in Mongolia. We propose to determine the efficacy of vitamin D supplements, as an adjunct to multidrug therapy, in enhancing the anti-microbial immune response to TB, a finding that could lead to the development of shorter drug regimens, and thus more efficient and effective TB treatment protocols.

We propose to conduct a double blind, placebo controlled, randomized clinical trial to test the effect of a daily vitamin D supplementation on the ability of subjects to control TB infection.

The Primary Endpoint: The primary endpoint will be: time to sputum culture conversion from positive to negative. The number of days to sputum conversion will be measured, in both the intervention and control groups, starting on the date that treatment is begun. Sputum samples will be collected and cultured every two weeks thereafter. The date of conversion from positive to negative, for each subject, will be the date halfway between the date of the last culture-positive sputum and the first culture-negative one.

Secondary Endpoints:

Bacteriologic secondary endpoints, cell-mediated immune function endpoints and BMI.


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Sputum positive TB patients

Exclusion Criteria:

  • We will exclude those with abnormal LFTs at baseline (2.5 times upper limit of normal), as they will be at higher risk of developing drug-induced hepatitis
  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.

Please refer to this study by its identifier: NCT01657656

National Center for Communicable Dieases
Ulaanbaatar, Mongolia
Sponsors and Collaborators
Harvard School of Public Health
  More Information

Responsible Party: Ganmaa Davaasambuu, Assistant Professor, Harvard School of Public Health Identifier: NCT01657656     History of Changes
Other Study ID Numbers: R00HL089710 ( U.S. NIH Grant/Contract )
Study First Received: August 2, 2012
Last Updated: July 29, 2014

Additional relevant MeSH terms:
Mycobacterium Infections
Actinomycetales Infections
Gram-Positive Bacterial Infections
Bacterial Infections
Vitamin D
Antitubercular Agents
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents
Anti-Bacterial Agents
Anti-Infective Agents processed this record on September 21, 2017