Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

285 questions · 327 findings · 36 reviews · Headline outcomes only

No studies found 129 · 39.4%GRADE not reported 11 · 3.4%Very low 82 · 25.1%Low 64 · 19.6%Moderate 38 · 11.6%High 3 · 0.9%

Laparoscopic vs open surgery

Late overall morbidity (after the first 30 postoperative days: within 6 months) · patients with sigmoid diverticulitis

It is very uncertain whether laparoscopic changes late overall morbidity (after the first 30 postoperative days:… compared with open surgery (very low certainty).

1 finding from 1 review

Laparoscopic vs open surgery

Late overall mortality (after the first 30 postoperative days) · patients with sigmoid diverticulitis

It is very uncertain whether laparoscopic changes late overall mortality (after the first 30 postoperative days) compared with open surgery (very low certainty).

1 finding from 1 review

Maintenance anaesthesia: inhalational vs intravenous

Nausea and vomiting ‐ subgroup analysis: thiopentone or halothane + N2O versus propofol or propofol + N2O · paediatric

Maintenance anaesthesia: inhalational may leads to higher nausea and vomiting ‐ subgroup analysis: thiopentone or halothane +… compared with intravenous (low certainty).

2 findings from 1 review

Summary of findings: Fibrin sealant vs usual care

Risk of a thrombotic/thromboembolic event (MI, CVA, DVT, PE) · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Fibrin sealant changes risk of a thrombotic/thromboembolic event (MI, CVA, DVT, PE) compared with usual care (very low certainty).

1 finding from 1 review

Tranexamic acid vs placebo

Risk of receiving any allogeneic blood product (data only available for intraoperative blood product use) · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Tranexamic acid changes risk of receiving any allogeneic blood product (data only available… compared with placebo (very low certainty).

1 finding from 1 review

Tranexamic acid vs placebo

Risk of reoperation or repeat procedure for bleeding within 7 days · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Tranexamic acid changes risk of reoperation or repeat procedure for bleeding within 7 days compared with placebo (very low certainty).

1 finding from 1 review

Tranexamic acid vs placebo

Risk of a thrombotic/thromboembolic event (MI, CVA, DVT, PE) · people aged 18 and over undergoing vascular surgery

Summary of findings: Tranexamic acid showed no clear difference in risk of a thrombotic/thromboembolic event (MI, CVA, DVT, PE) compared with placebo (low certainty).

1 finding from 1 review

Summary of findings: Fibrin sealant vs usual care

All‐cause mortality up to 30 days · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Fibrin sealant changes all‐cause mortality up to 30 days compared with usual care (very low certainty).

1 finding from 1 review

Summary of findings: Fibrin sealant vs usual care

Risk of reoperation or repeat procedure for bleeding within 7 days · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Fibrin sealant changes risk of reoperation or repeat procedure for bleeding within 7 days compared with usual care (very low certainty).

1 finding from 1 review

Timing of wound closure (immediate vs delayed)

Deep surgical site infection · adults with open long bone fractures of the upper and lower limbs

It is very uncertain whether timing of wound closure (immediate changes deep surgical site infection compared with delayed) (very low certainty).

1 finding from 1 review

Timing of wound closure (immediate vs delayed)

Delayed or non‐union (medium term) · adults with open long bone fractures of the upper and lower limbs

It is very uncertain whether timing of wound closure (immediate changes delayed union or non‐union compared with delayed) (very low certainty).

1 finding from 1 review

Timing of wound closure (immediate vs delayed)

Adverse events ‐ superficial infection · adults with open long bone fractures of the upper and lower limbs

It is very uncertain whether timing of wound closure (immediate changes adverse events ‐ superficial infection compared with delayed) (very low certainty).

1 finding from 1 review