Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

110 questions · 116 findings · 12 reviews

No studies found 42 · 36.2%GRADE not reported 16 · 13.8%Very low 18 · 15.5%Low 20 · 17.2%Moderate 18 · 15.5%High 2 · 1.7%

Vitamin D vs placebo or no intervention

Adverse effect: hypercalciuria As defined by trialists Time frame: 3 months · children under 5 years of age

Vitamin D showed no clear difference in adverse effect: hypercalciuria As defined by trialistsTime frame:… compared with placebo or no intervention (moderate certainty).

1 finding from 1 review

Vitamin D vs placebo or no intervention

Hypercalcaemia · children under 5 years of age

It is very uncertain whether vitamin D changes adverse effect: hypercalcaemia As defined by trialistsTime frame:… compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Vitamin D (higher dose) vs vitamin D (lower dose)

Adverse effect: hypercalciuria As defined by trialists Time frame: 3 months · children under 5 years of age

Vitamin D (higher dose) showed no clear difference in adverse effect: hypercalciuria As defined by trialists Time frame:… compared with vitamin D (lower dose) (low certainty).

1 finding from 1 review