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Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

9 questions · 9 findings · 1 reviews · Headline outcomes only

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No studies found 6 · 66.7%GRADE not reported 0 · 0%Very low 0 · 0%Low 3 · 33.3%Moderate 0 · 0%High 0 · 0%

Heliox vs oxygen 30%

Proportion of children hospitalised · children with croup

The review found no eligible studies for this question.

1 finding from 1 review

Heliox vs oxygen 30%

Length of hospital stay · children with croup

The review found no eligible studies for this question.

1 finding from 1 review

Heliox vs oxygen 30%

Proportion of children intubated · children with croup

The review found no eligible studies for this question.

1 finding from 1 review

Heliox vs oxygen 30%

Duration of intubation · children with croup

The review found no eligible studies for this question.

1 finding from 1 review

Heliox vs oxygen 30%

Proportion of children re‐presenting for medical care for ongoing croup symptoms (return to care) · children with croup

The review found no eligible studies for this question.

1 finding from 1 review

Heliox vs oxygen 30%

Adverse events · children with croup

The review found no eligible studies for this question.

1 finding from 1 review