evidencegaps
Findings

What do systematic reviews say?

Refine by population, intervention, comparison or outcome
More filters
Evidence found and GRADE certainty

780 questions · 834 findings · 76 reviews

Sort:Best matchNewestHighest certaintyDownload CSV
No studies found 187 · 22.4%GRADE not reported 164 · 19.7%Very low 144 · 17.3%Low 172 · 20.6%Moderate 105 · 12.6%High 62 · 7.4%

Vitamin A vs placebo or usual care

Diarrhoea incidence Mean episodes per child per year · children aged between 6 months and 5 years

Vitamin A supplementation may leads to lower diarrhoea incidence Mean episodes per child per year compared with placebo or usual care (low certainty).

1 finding from 1 review

Vitamin A vs placebo or usual care

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

Vitamin D given to lactating mothers vs placebo or no treatment

Vitamin D insufficiency: 25‐OH vitamin D < 50 nmol/L · term breastfed infants to prevent vitamin D deficiency and improve bone health

Vitamin D given to lactating mothers may leads to lower vitamin D insufficiency: 25‐OH vitamin D < 50 nmol/L compared with placebo or no treatment (low certainty).

1 finding from 1 review

Vitamin D given to lactating mothers vs placebo or no treatment

Vitamin D deficiency: 25‐OH vitamin D < 30 nmol/L · term breastfed infants to prevent vitamin D deficiency and improve bone health

Vitamin D given to lactating mothers may leads to lower vitamin D deficiency: 25‐OH vitamin D < 30 nmol/L compared with placebo or no treatment (low certainty).

1 finding from 1 review

Neonatal vitamin A supplementation vs control

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

Neonatal vitamin A supplementation vs control

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 vitamin A supplementation vs control

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

Neonatal vitamin A supplementation vs control

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

Neonatal vitamin A supplementation vs control

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

Neonatal vitamin A supplementation vs control

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

Summary of findings table ‐ Vitamin B12 supplementation vs no supplementation or placebo

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