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What do systematic reviews say?

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Evidence found and GRADE certainty

2 questions · 2 findings · 2 reviews · Airways

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 1 · 50%Low 0 · 0%Moderate 0 · 0%High 1 · 50%

Intervention not reported

Serious Adverse Events (Participants with one or more event) · Adults (>18 years) with pulmonary hypertension of varied aetiology (PAH, CTEPH and left heart disease)

It is very uncertain whether the intervention changes serious Adverse Events (Participants with one or more event) (very low certainty).

1 finding from 1 review

Vitamin D vs placebo

Proportion of participants with one or more serious adverse events due to any cause · children and adults with predominantly mild to moderate asthma

Summary of findings table ‐ Vitamin D showed no clear difference in proportion of participants with one or more serious adverse events… compared with placebo (high certainty).

1 finding from 1 review