Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

884 questions · 892 findings · 68 reviews · Anaesthesia

No studies found 118 · 13.2%GRADE not reported 156 · 17.5%Very low 187 · 21%Low 270 · 30.3%Moderate 119 · 13.3%High 42 · 4.7%

Intervention not reported

Surgical site infection within 30 days in trials with low risk of bias (14 days to 30 days) · surgical patients with need for abdominal, caesarean section, orthopaedic or breast surgery

The intervention showed no clear difference in surgical site infection within 30 days in trials with low risk of… (low certainty).

1 finding from 1 review

Intervention not reported

Surgical site infection within 30 days, irrespective of risk of bias (14 days to 30 days) · surgical patients with need for abdominal, caesarean section, orthopaedic or breast surgery

The intervention showed no clear difference in surgical site infection within 30 days, irrespective of risk of bias… (low certainty).

1 finding from 1 review

Intervention not reported

Respiratory insufficiency · surgical patients with need for abdominal, caesarean section, orthopaedic or breast surgery

The intervention showed no clear difference in respiratory insufficiency (moderate certainty).

1 finding from 1 review

Epidural anaesthesia in addition to general anaesthesia vs general anaesthesia

Death from all causes Range of · patients undergoing primary tumour surgery

Epidural anaesthesia in addition to general anaesthesia showed no clear difference in death from all causes Range of compared with general anaesthesia alone (low certainty).

1 finding from 1 review

Epidural anaesthesia in addition to general anaesthesia vs general anaesthesia

Tumour progression or death from all causes Range of · patients undergoing primary tumour surgery

It is very uncertain whether epidural anaesthesia in addition to general anaesthesia changes tumour progression or death from all causes Range of compared with general anaesthesia alone (very low certainty).

1 finding from 1 review

Epidural anaesthesia in addition to general anaesthesia vs general anaesthesia

Tumour progression Median · patients undergoing primary tumour surgery

It is very uncertain whether epidural anaesthesia in addition to general anaesthesia changes tumour progression Median compared with general anaesthesia alone (very low certainty).

1 finding from 1 review

Intervention not reported

Reported mortality, low risk of bias studies only · patients undergoing surgery

It is very uncertain whether the intervention changes reported mortality, low risk of bias studies only (very low certainty).

1 finding from 1 review

Intervention not reported

Acute renal injury, low‐risk studies only · patients undergoing surgery

It is very uncertain whether the intervention changes acute renal injury, low‐risk studies only (very low certainty).

1 finding from 1 review

Summary of findings TIVA vs inhalational maintenance of anaesthesia

Postoperative delirium (One study used DRS, three studies used CAM and in one study diagnostic tool was not reported) Time points were up to 4 days postoperatively

It is very uncertain whether summary of findings TIVA changes postoperative delirium (One study used DRS, three studies used CAM… compared with inhalational maintenance of anaesthesia (very low certainty).

1 finding from 1 review

Summary of findings TIVA vs inhalational maintenance of anaesthesia

Postoperative cognitive dysfunction (9 studies used MMSE, and 2 of these studies used additional diagnostic tools; 1 study used Trail Making Test and additional diagnostic tools; 3 studies did not report diagnostic tools) Time points were up to 30...

Summary of findings TIVA may leads to lower postoperative cognitive dysfunction (9 studies used MMSE, and 2 of… compared with inhalational maintenance of anaesthesia (low certainty).

1 finding from 1 review