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What do systematic reviews say?

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Evidence found and GRADE certainty

10 questions · 10 findings · 4 reviews

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No studies found 4 · 40%GRADE not reported 2 · 20%Very low 1 · 10%Low 3 · 30%Moderate 0 · 0%High 0 · 0%

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

Summary of findings table ‐ Collagen vs standard diet or placebo

Adverse effects/events: at least 1 adverse effect ‐ as defined by individual studies. · adults with pressure ulcers

It is very uncertain whether summary of findings table ‐ Collagen changes side effects: at least one adverse event compared with standard diet or placebo (very low certainty).

1 finding from 1 review