Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

29 questions · 29 findings · 8 reviews

No studies found 8 · 27.6%GRADE not reported 0 · 0%Very low 11 · 37.9%Low 5 · 17.2%Moderate 4 · 13.8%High 1 · 3.4%

Intervention not reported

Early mortality (90 days) · patients with diffuse emphysema

The intervention probably leads to higher early mortality (90 days) (moderate certainty).

1 finding from 1 review

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

Intervention not reported

Mortality In the early postoperative period (≤ 30 days) · participants with hydrocephalus
1 finding from 1 review