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Different Doses of Vitamin A and Childhood Morbidity and Mortality

This study has been completed.
Information provided by:
Bandim Health Project Identifier:
First received: September 12, 2005
Last updated: NA
Last verified: September 2005
History: No changes posted
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 Intervention Phase
Mortality Morbidity Drug: Vitamin A Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Randomised Study of the Impact of Different Doses of Vitamin A on Childhood Morbidity and Mortality

Resource links provided by NLM:

Further study details as provided by Bandim Health Project:

Primary Outcome Measures:
  • Mortality
  • Hospitalisations
  • Morbidity
  • Growth

Secondary Outcome Measures:
  • Rotavirus infection

Estimated Enrollment: 5400
Study Start Date: November 2002
Estimated Study Completion Date: August 2003
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.


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. -

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Please refer to this study by its identifier: NCT00168584

Bandim Health Project, Apartado 861
Bissau, Guinea-Bissau
Sponsors and Collaborators
Bandim Health Project
Principal Investigator: Peter Aaby, DMSc Bandim Health Project
  More Information Identifier: NCT00168584     History of Changes
Other Study ID Numbers: 91096-2dos02
Study First Received: September 12, 2005
Last Updated: September 12, 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 processed this record on June 21, 2017