Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

780 questions · 834 findings · 76 reviews

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%

Multivitamin vs placebo

Average mouth pain during RAS episodes · Participants with a previous or current history of recurrent aphthous stomatitis (RAS), diagnosed on history and clinical examination;…

Daily multivitamin showed no clear difference in average mouth pain during RAS episodes compared with placebo; GRADE not reported.

1 finding from 1 review

Multivitamin vs placebo

Average number of new lesions per week · Participants with a previous or current history of recurrent aphthous stomatitis (RAS), diagnosed on history and clinical examination;…

Daily multivitamin showed no clear difference in mean number of new lesions compared with placebo; GRADE not reported.

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