Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,756 questions · 13,493 findings · 1,305 reviews · Headline outcomes only

No studies found 2,594 · 19.2%GRADE not reported 728 · 5.4%Very low 2,868 · 21.3%Low 3,777 · 28%Moderate 2,620 · 19.4%High 906 · 6.7%

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Intrauterine infusion/injection of autologous platelet‐rich plasma vs placebo or no intervention

Clinical pregnancy · women undergoing assisted reproduction

It is very uncertain whether intrauterine infusion/injection of autologous platelet‐rich plasma changes clinical pregnancy compared with no intervention or placebo (very low certainty).

1 finding from 1 review

Intrauterine infusion/injection of autologous platelet‐rich plasma vs placebo or no intervention

Adverse event ‐ multiple pregnancy · women undergoing assisted reproduction

It is very uncertain whether intrauterine infusion/injection of autologous platelet‐rich plasma changes adverse events: multiple pregnancy compared with no intervention or placebo (very low certainty).

1 finding from 1 review

Intrauterine infusion/injection of autologous platelet‐rich plasma vs placebo or no intervention

Adverse events: ectopic pregnancy · women undergoing assisted reproduction

It is very uncertain whether intrauterine infusion/injection of autologous platelet‐rich plasma changes adverse events: ectopic pregnancy compared with no intervention or placebo (very low certainty).

1 finding from 1 review

BivWC vaccine (Shanchol): two doses vs placebo

Cases of cholera ( · healthy children and adults; high risk population
3 findings from 1 review

Zinc vs placebo

Risk of adverse events, including those that may be due to zinc supplements Duration of · adults and children with colds and/or upper respiratory infections
1 finding from 1 review

Zinc vs placebo

Risk of serious adverse events, including those that may be complications of the common cold · adults and children with colds and/or upper respiratory infections

The review found no eligible studies for this question.

1 finding from 1 review

Antibiotics vs placebo or no intervention

All‐cause mortality · farmworkers, soldiers, and people in endemic areas

Summary of findings table ‐ Antibiotics showed no clear difference in all‐cause mortality compared with placebo or no intervention (low certainty).

1 finding from 1 review