Measles incidence Mean episodes of measles per child per year · children aged between 6 months and 5 years
Vitamin A supplementation probably leads to lower measles incidence Mean episodes of measles per child per year compared with placebo or usual care (moderate certainty).
1 finding from 1 review
Incidence of LRTI · children aged between 6 months and 5 years
Vitamin A supplementation showed no clear difference in LRTI incidence Mean episodes per child per year compared with placebo or usual care (low certainty).
1 finding from 1 review
Bitot's spots incidence · children aged between 6 months and 5 years
Vitamin A supplementation probably leads to lower bitot's spots incidence compared with placebo or usual care (moderate certainty).
1 finding from 1 review
Night blindness incidence · children aged between 6 months and 5 years
Vitamin A supplementation probably leads to lower night blindness incidence compared with placebo or usual care (moderate certainty).
1 finding from 1 review
Change in 25(OH) vitamin D concentrations (ng/mL) · adults with HIV infection
1 finding from 1 review
Maternal vitamin B12 deficiency · pregnant women
It is very uncertain whether summary of findings table ‐ Vitamin B12 supplementation changes maternal vitamin B12 deficiency compared with placebo/no vitamin B12 supplementation (very low certainty).
1 finding from 1 review
Any adverse effects · pregnant women
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
All‐cause infant mortality at 6 months: risk ratios based on cumulative risk (%, adjusted for clustering) ‐ term infants · mortality and morbidity in term neonates
It is very uncertain whether neonatal vitamin A supplementation changes all‐cause infant mortality at 6 months: risk ratios based on… compared with control (very low certainty).
1 finding from 1 review
Infant Mortality at 6 Months · mortality and morbidity in term neonates
Neonatal vitamin A supplementation showed no clear difference in all‐cause infant mortality at 6 months: risk ratios based on… compared with control (high certainty).
1 finding from 1 review
Neonatal mortality · mortality and morbidity in term neonates
Neonatal vitamin A supplementation showed no clear difference in all‐cause neonatal mortality: risk ratios based on cumulative risk… compared with control (high certainty).
1 finding from 1 review
Adverse events during first 48‐72 hours post supplementation ‐ bulging fontanelle · mortality and morbidity in term neonates
Neonatal vitamin A supplementation leads to higher adverse events during first 48‐72 hours post supplementation ‐… compared with control (high certainty).
1 finding from 1 review
Vomiting · mortality and morbidity in term neonates
Neonatal vitamin A supplementation showed no clear difference in adverse events during first 48‐72 hours post supplementation ‐… compared with control (high certainty).
1 finding from 1 review
Adverse effects: diarrhoea 48 to 72 hours · mortality and morbidity in term neonates
Neonatal vitamin A supplementation showed no clear difference in adverse events during first 48‐72 hours post supplementation ‐… compared with control (low certainty).
1 finding from 1 review
Serum/plasma retinol (μmol/L) · general population over 2 years of age
1 finding from 1 review
All‐cause mortality · general population over 2 years of age
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
All‐cause morbidity · general population over 2 years of age
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Cancer occurrence · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…
Vitamin D showed no clear difference in cancer occurrence compared with placebo or no intervention (moderate certainty).
1 finding from 1 review
All‐cause mortality · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…
Vitamin D may leads to lower all‐cause mortality compared with placebo or no intervention (low certainty).
1 finding from 1 review
Health‐related quality of life · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Health economics · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found