Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

49 questions · 51 findings · 25 reviews

No studies found 16 · 31.4%GRADE not reported 2 · 3.9%Very low 18 · 35.3%Low 9 · 17.6%Moderate 3 · 5.9%High 3 · 5.9%

Percutaneous ethanol injection vs radiofrequency ablation

Serious adverse events (number of events) · people with early‐ or very early‐stage hepatocellular carcinoma ineligible for surgery

It is very uncertain whether percutaneous alcohol injection changes serious adverse events (number of events) compared with radiofrequency ablation (very low certainty).

1 finding from 1 review

Percutaneous ethanol injection vs radiofrequency ablation

Serious adverse events (number of participants) · people with early‐ or very early‐stage hepatocellular carcinoma ineligible for surgery

It is very uncertain whether percutaneous alcohol injection changes serious adverse events (number of participants) compared with radiofrequency ablation (very low certainty).

1 finding from 1 review

Intrauterine infusion of autologous platelet‐rich plasma vs no intervention

Adverse events: ectopic pregnancy · women undergoing assisted reproduction

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

1 finding from 1 review

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

Adverse events: preterm delivery · women undergoing assisted reproduction

Intrauterine infusion/injection of autologous platelet‐rich plasma may leads to higher adverse events: preterm delivery compared with no intervention or placebo (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

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

Autologous blood or PRP vs placebo at 3 months' follow‐up

Adverse events (pain and swelling at injection site and limitation of elbow movement following injection) · lateral elbow pain

Autologous blood or PRP showed no clear difference in adverse events (pain and swelling at injection site and limitation… compared with placebo at 3 months' follow‐up (low certainty).

1 finding from 1 review

Intervention not reported

Major adverse events** ‒short‐term (> 2 weeks but ≤ 3 months) Major adverse events provided as the proportion of patients reporting any untoward medical occurrence after an epidural injection with hospitalizations. · lumbosacral radicular pain
1 finding from 1 review

Intervention not reported

Minor adverse events** ‒short‐term (> 2 weeks but ≤ 3 months) Minor adverse events provided as the proportion of patients reporting any untoward medical occurrence after an epidural injection without hospitalisations. · lumbosacral radicular pain

It is very uncertain whether the intervention changes minor adverse events** ‒short‐term (> 2 weeks but ≤ 3 months) Minor… (very low certainty).

1 finding from 1 review

Nonavalent HPV vaccine vs quadrivalent HPV vaccine

Overall local/injection site adverse events at 15‐day · 9‐ to 26‐year‐old females and males

Nonavalent HPV vaccine leads to higher overall local/injection site adverse events at 15‐day compared with quadrivalent HPV vaccine (high certainty).

1 finding from 1 review

Live zoster vaccine vs placebo

Participants with adverse events ‐ injection site adverse events Clinical criteria · healthy older adults aged ≥ 60 years

Live zoster vaccine probably leads to higher participants with adverse events ‐ injection site adverse… compared with placebo (moderate certainty).

1 finding from 1 review