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Vitamin A Supplementation at Birth and Atopy in Childhood

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2013 by Bandim Health Project.
Recruitment status was:  Active, not recruiting
Information provided by (Responsible Party):
Bandim Health Project Identifier:
First received: January 28, 2013
Last updated: November 14, 2013
Last verified: February 2013

INTRODUCTION Eight trials studying the effect of providing neonatal vitamin A supplementation (NVAS) have been reported, and another four are underway to test whether NVAS should become WHO policy. Three of the four African trials were conducted by the Bandim Health Project (BHP) in Guinea-Bissau. One of them was a two-by-two factorial trial among low-birth-weight children. From 2004-2008, the children were randomly allocated to 25,000 IU vitamin A or placebo at birth, and furthermore to BCG vaccination at birth or later as is local policy. In 2011, the investigators conducted a follow-up study. A remarkably strong harmful effect of NVAS on atopy and wheezing was found (manuscript under review).

Seen in the context that NVAS may soon become a WHO policy it is obviously worrying if NVAS is associated with a higher risk of atopy and wheezing. The investigators therefore aim to conduct a similar follow-up study of participants in the first NVAS trial conducted in Guinea-Bissau from 2002-2004, among normal-birth-weight infants, to test whether NVAS is associated with an increased risk of atopy and wheezing and other allergic symptoms as well as growth.


Study population:

From 2002-2004 BHP conducted a randomised trial of NVAS. The investigators recruited newborns when they came for BCG vaccination. Provided parental consent, they received an oral supplement of 50,000 IU vitamin A or placebo.

Study design:

This study will be a follow-up study of the cohort of children randomised to NVAS (intervention) or placebo (current policy) together with BCG vaccine at birth.

Other exposures:

The investigators will also investigate the effect of receiving an additional dose of measles vaccine and the timing of DTP vaccine on the development of atopy.

Assessment of outcomes:

The investigators will visit all children at the last known address. Height, weight and mid upper arm circumference will be measured. BCG scar will be examined and vaccination card details recorded by the field assistant. Children will be excluded from skin prick testing (SPT) if they have a history suggestive of anaphylaxis or are currently using anti-histamine medication. SPT will be performed using aero-allergens, food allergens and positive histamine and negative saline control. The mother or guardian will be interviewed by a local assistant. Symptoms of eczema and asthma as well as food allergy will be assessed.

Statistical analysis:

Effect of randomisation group and other factors on outcomes will be analysed in multivariable regression models. All analyses will be adjusted for skin prick tester. All analyses will be conducted stratified by sex.

Atopy Asthma Eczema Food Allergy

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: The Effect of Vitamin A Supplementation at Birth on the Development of Atopy in Childhood: Long-term Follow-up of a Randomised Placebo-controlled Trial

Resource links provided by NLM:

Further study details as provided by Bandim Health Project:

Primary Outcome Measures:
  • Atopic sensitisation [ Time Frame: Single observation on day of recruitment ]
    Skin prick test positivity. A wheal >=3mm will be considered positive.

Secondary Outcome Measures:
  • Symptoms of asthma [ Time Frame: Single observation on day of recruitment ]
    Questionnaire based on ISAAC survey for 6-7 year olds

  • Symptoms of eczema [ Time Frame: Single observation on day of recruitment ]
    Questionnaire based on ISAAC survey for 6-7 year olds

  • Symptoms of food allergy [ Time Frame: Single observation of day of recruitment ]
    Questionnaire based on Health Nuts survey

Other Outcome Measures:
  • Weight [ Time Frame: Single observation on day of recruitment ]
  • Height [ Time Frame: Single observation on day of recruitment ]
  • Mid-upper arm circumference [ Time Frame: Single observation on day of recruitment ]
  • Hospitalisations [ Time Frame: Single observation on day of recruitment ]
  • Infectious diseases [ Time Frame: Single observation on day of recruitment ]
    History of chickenpox or measles

Estimated Enrollment: 2000
Study Start Date: January 2013
Estimated Study Completion Date: February 2014
Primary Completion Date: November 2013 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   8 Years to 12 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Participants in a previous neonatal vitamin A supplementation trial

Inclusion Criteria:

  • Enrolled at birth in NCT00168610

Exclusion Criteria:

  • Children with history suggestive of anaphylaxis will be excluded from skin prick testing but included in the study population
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Please refer to this study by its identifier: NCT01779180

Bandim Health Project
Bissau, Bissau Codex, Guinea-Bissau, 1004
Sponsors and Collaborators
Bandim Health Project
Principal Investigator: Christine Benn, DMSc Statens Serum Institut
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Bandim Health Project Identifier: NCT01779180     History of Changes
Other Study ID Numbers: 2013-VAS-Atopy
Study First Received: January 28, 2013
Last Updated: November 14, 2013

Keywords provided by Bandim Health Project:
Vitamin A supplementation
BCG vaccination
diphtheria-tetanus-pertussis vaccination
measles vaccination

Additional relevant MeSH terms:
Food Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases
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 September 21, 2017