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Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

5 questions · 5 findings · 2 reviews · Colorectal

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 3 · 60%Moderate 2 · 40%High 0 · 0%

Preoperative radiotherapy vs surgery

Overall mortality ‐ only total mesorectal excision ( · People with localised rectal carcinoma

Preoperative radiotherapy showed no clear difference in overall mortality ‐ only total mesorectal excision ( compared with surgery alone (low certainty).

1 finding from 1 review

Summary of findings table ‐ Combined mechanical and oral antibiotic bowel preparation vs mechanical bowel preparation alone

All‐cause mortality · Patients undergoing elective colorectal surgery

Summary of findings table ‐ Combined mechanical and oral antibiotic… showed no clear difference in mortality compared with mechanical bowel preparation alone (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ Combined mechanical and oral antibiotic bowel preparation vs oral antibiotics

All‐cause mortality · Patients undergoing elective colorectal surgery

Summary of findings table ‐ Combined mechanical and oral antibiotic… showed no clear difference in mortality compared with oral antibiotics alone (low certainty).

1 finding from 1 review