Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,815 questions · 6,211 findings · 638 reviews · Headline outcomes only

No studies found 1,052 · 16.9%GRADE not reported 441 · 7.1%Very low 1,700 · 27.4%Low 1,651 · 26.6%Moderate 1,070 · 17.2%High 297 · 4.8%

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Pay for performance (P4P) plus existing payment methods vs existing payment methods

Unintended or adverse effects · healthcare providers working in outpatient healthcare settings

Pay for performance (P4P) plus existing payment methods may leads to lower unintended or adverse effects compared with existing payment methods (low certainty).

1 finding from 1 review

Second‐generation endometrial ablation vs first‐generation endometrial ablation

Proportion given local anaesthesia (%) · heavy menstrual bleeding

It is very uncertain whether overall analyses: second‐generation endometrial ablation changes proportion given local anaesthesia (%) compared with first‐generation endometrial ablation (very low certainty).

1 finding from 1 review

Second‐generation endometrial ablation vs first‐generation endometrial ablation

Complication rate ‐ perforation · heavy menstrual bleeding

Overall analyses: second‐generation endometrial ablation showed no clear difference in complication rate ‐ perforation compared with first‐generation endometrial ablation (low certainty).

1 finding from 1 review

Second‐generation endometrial ablation vs first‐generation endometrial ablation

Requirement for additional (surgical) interventions · heavy menstrual bleeding

Overall analyses: second‐generation endometrial ablation showed no clear difference in requirement for additional surgery compared with first‐generation endometrial ablation (low certainty).

1 finding from 1 review

Metoprolol vs placebo

All cardiovascular death · patients of any age with AAA less than 30 mm in diameter

Metoprolol showed no clear difference in cardiovascular death, 30 days3 compared with placebo (low certainty).

2 findings from 1 review

Metoprolol vs placebo

AAA‐related death, 30 days4 · patients of any age with AAA less than 30 mm in diameter

Metoprolol showed no clear difference in AAA‐related death, 30 days4 compared with placebo (low certainty).

2 findings from 1 review