MortalityPhase 4NCT00168584
Different Doses of Vitamin A and Childhood Morbidity and Mortality
A Phase 4 study testing Vitamin A in people with Mortality and Morbidity, run by Bandim Health Project at 1 site in Guinea-Bissau.
Trial 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. Read more about this study
- Who is it for?
- Ages 6 months to 5 years
- What is being tested?
- Vitamin A
- How many people
- 5,400 participants
- Where
- 1 siteGuinea-Bissau
- Study dates
- Nov 2002to Aug 2003
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 6 months to 5 years
- All sexes
- No healthy volunteers
- Child
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. -
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Randomised Study of the Impact of Different Doses of Vitamin A on Childhood Morbidity and Mortality
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.
Read the 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.
- Being tested
- Vitamin A
- Keywords
- Vitamin A, Mortality, Morbidity, Doses, OPV
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Vitamin ADrug
What is being measured
The primary outcome is the main question the study is designed to answer.
Mortality
Hospitalisations
Morbidity
Growth
Secondary outcomes (1)
Rotavirus infection
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Sep 2005 (estimated)
- Study startNov 2002
- Study completionAug 2003
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for MortalityStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 5,400 participants
Sponsor and investigators
- Lead sponsor
- Bandim Health Project
- Sponsor type
- University, hospital or other
- Investigators
- Peter Aaby, DMSc, Principal investigator, Bandim Health Project
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00168584
- Sponsor's protocol ID
- 91096-2dos02
- Other IDs
- 91096-02
- Status last verified
- Sep 2005
- First submitted
- 12 Sep 2005
- Last updated
- 15 Sep 2005
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 Sep 2005. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Randomised Study of the Impact of Different Doses of Vitamin A on Childhood Morbidity and Mortality
- ClinicalTrials.gov ID
- NCT00168584
- Acronym / sponsor ID
- 91096-2dos02
- Keywords
- Vitamin A, Mortality, Morbidity, Doses, OPV
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 5,400 participants
- Lead sponsor
- Bandim Health ProjectUniversity, hospital or other
- Study start
- Nov 2002
- Study completion
- Aug 2003
- First posted
- 15 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
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 design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
Who may qualify
- Ages
- 6 months to 5 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Vitamin A | Drug | – |
Primary outcome
Mortality
Hospitalisations
Morbidity
Growth
1 secondary outcome
Rotavirus infection
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 Sep 2005.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Peter Aaby, DMSc principal investigator
Bandim Health Project
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Vitamin A in people with Mortality and Morbidity, run by Bandim Health Project at 1 site in Guinea-Bissau.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 15 Sep 2005. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Guinea-Bissau. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Mortality. The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Sep 2005.