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What do systematic reviews say?

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Evidence found and GRADE certainty

4,721 questions · 19,640 findings · 2,039 reviews · Headline outcomes only

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No studies found 3,754 · 19.1%GRADE not reported 1,273 · 6.5%Very low 4,859 · 24.7%Low 5,568 · 28.4%Moderate 3,240 · 16.5%High 946 · 4.8%

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

Surgical site infection · Patients undergoing elective colorectal surgery

It is very uncertain whether summary of findings table ‐ Combined mechanical and oral antibiotic… changes surgical site infections compared with oral antibiotics alone (very low certainty).

1 finding from 1 review

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

Anastomotic leakage · Patients undergoing elective colorectal surgery

Summary of findings table ‐ Combined mechanical and oral antibiotic… showed no clear difference in anastomotic leakage compared with oral antibiotics alone (low 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

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

Postoperative ileus · Patients undergoing elective colorectal surgery

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

1 finding from 1 review

Different types of pressure garment (Caroskin Tricot plus an adhesive silicone gel sheet vs Gecko Nanoplast

Scar improvement (POSAS) (0–10, higher score = more severe scarring) · people with burn wounds likely to develop hypertrophic scarring

The review found no eligible studies for this question.

2 findings from 1 review

Lower salt intake vs usual or high salt intake

Systolic blood pressure · patients with diabetes with or without CKD
3 findings from 1 review

Lower salt intake vs usual or high salt intake

MAP Duration: up to 12 weeks · patients with diabetes with or without CKD
2 findings from 1 review