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What do systematic reviews say?

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Evidence found and GRADE certainty

3,097 questions · 3,266 findings · 631 reviews

No studies found 430 · 13.2%GRADE not reported 193 · 5.9%Very low 995 · 30.5%Low 904 · 27.7%Moderate 591 · 18.1%High 153 · 4.7%

Perioperative beta‐blockers vs placebo or usual care

Early all‐cause mortality (within 30 days) · adults undergoing non‐cardiac surgery under general anaesthesia (to include: low‐risk, medium‐risk, and high‐risk surgeries)

Perioperative beta‐blockers showed no clear difference in early all‐cause mortality (within 30 days) compared with placebo or standard care (low certainty).

1 finding from 1 review