Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,841 questions · 1,893 findings · 109 reviews · Headline outcomes only

No studies found 546 · 28.8%GRADE not reported 117 · 6.2%Very low 613 · 32.4%Low 473 · 25%Moderate 118 · 6.2%High 26 · 1.4%

Scalp infiltration vs placebo or control

Adverse event nausea and vomiting (0 to 24 hours) · adults undergoing brain surgery

Scalp infiltration showed no clear difference in adverse event nausea and vomiting (0 to 24 hours) compared with control or placebo intervention (low certainty).

1 finding from 1 review

Scalp block vs placebo or control

Adverse event nausea and vomiting (0 to 24 hours) · adults undergoing brain surgery

It is very uncertain whether scalp block changes adverse event nausea and vomiting (0 to 24 hours) compared with control or placebo intervention (very low certainty).

1 finding from 1 review