Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

126 questions · 128 findings · 13 reviews · Headline outcomes only

No studies found 40 · 31.3%GRADE not reported 7 · 5.5%Very low 44 · 34.4%Low 27 · 21.1%Moderate 10 · 7.8%High 0 · 0%

Saline vs carbon dioxide

Adverse events and complications · women undergoing outpatient hysteroscopy

Saline probably leads to lower adverse events and complications compared with carbon dioxide (moderate certainty).

1 finding from 1 review