Different Doses of Vitamin A and Childhood Morbidity and Mortality

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00168584
Recruitment Status : Completed
First Posted : September 15, 2005
Last Update Posted : September 15, 2005
Information provided by:
Bandim Health Project

Brief Summary:
Vitamin A supplementation reduces all-cause mortality. It is therefore given with oral polio vaccine in national campaigns. However, it is not clear which dose is optimal. The two studies that have investigated the impact of different doses of vitamin A have both found that a smaller dose was better than a large dose. We therefore investigated if a smaller dose given with oral polio vaccine gives equal or better effect.

Condition or disease Intervention/treatment Phase
Mortality Morbidity Drug: Vitamin A Phase 4

Detailed Description:

Vitamin A supplementation (VAS) to children above 6 months of age reduces all-cause mortality with 23 %1 to 30 % in low-income countries. WHO recommends VAS at vaccination contacts. The currently recommended doses to be administered every 3-6 months are 100,000 IU for infants between 6 and 11 months of age and 200,000 IU for children 12 months and older. There is no clear evidence that a large dose is better than a small dose, the tendency being the opposite in the two studies of different doses of VAS that have been published so far.

With the global effort to eradicate polio, national immunization days with oral polio vaccine (OPV) offer an additional opportunity to provide vitamin A. In Guinea-Bissau, a combined OPV and VAS campaign took place in November 2002. Given the uncertainty about the best dose of VAS, we aimed to examine whether the dose of vitamin A currently recommended by WHO or half this dose gives a better protection against childhood morbidity and mortality.

Study Type : Interventional  (Clinical Trial)
Enrollment : 5400 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Randomised Study of the Impact of Different Doses of Vitamin A on Childhood Morbidity and Mortality
Study Start Date : November 2002
Study Completion Date : August 2003

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Vitamin A
U.S. FDA Resources

Primary Outcome Measures :
  1. Mortality
  2. Hospitalisations
  3. Morbidity
  4. Growth

Secondary Outcome Measures :
  1. Rotavirus infection

Information from the National Library of Medicine

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Ages Eligible for Study:   6 Months to 5 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:Between 6 mo and 5 years old and thus eligible for OPV and vitamin A during national immunisation day

Exclusion Criteria:Children with overt signs of vitamin A deficiency will not be enrolled in the study, but treated according to the recommendations. -

Information from the National Library of Medicine

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 identifier (NCT number): NCT00168584

Bandim Health Project, Apartado 861
Bissau, Guinea-Bissau
Sponsors and Collaborators
Bandim Health Project
Principal Investigator: Peter Aaby, DMSc Bandim Health Project Identifier: NCT00168584     History of Changes
Other Study ID Numbers: 91096-2dos02
First Posted: September 15, 2005    Key Record Dates
Last Update Posted: September 15, 2005
Last Verified: September 2005

Keywords provided by Bandim Health Project:
Vitamin A

Additional relevant MeSH terms:
Vitamin A
Retinol palmitate
Growth Substances
Physiological Effects of Drugs
Molecular Mechanisms of Pharmacological Action
Protective Agents
Anticarcinogenic Agents
Antineoplastic Agents