Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,288 questions · 3,354 findings · 516 reviews · Headline outcomes only

No studies found 720 · 21.5%GRADE not reported 164 · 4.9%Very low 950 · 28.3%Low 932 · 27.8%Moderate 434 · 12.9%High 154 · 4.6%

Laparoscopic pyloromyotomy vs open pyloromyotomy

Postoperative wound infection or abscess formation · infants (< 1 year of age) with hypertrophic pyloric stenosis

It is very uncertain whether laparoscopic pyloromyotomy changes postoperative wound infection or abscess formation compared with open pyloromyotomy (very low certainty).

1 finding from 1 review

Roux‐en‐Y vs Billroth‐I after distal gastrectomy

Anastomotic leakage · people undergoing distal gastrectomy for gastric cancer

It is very uncertain whether roux‐en‐Y changes incidence of anastomotic leakage compared with billroth‐I after distal gastrectomy (very low certainty).

1 finding from 1 review

Intervention not reported

No active intervention(2 RCTs, 256 participants) · people with liver cirrhosis and oesophageal varices with no history of bleeding

It is very uncertain whether the intervention changes no active intervention(2 RCTs, 256 participants) (very low certainty).

1 finding from 1 review