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What do systematic reviews say?

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Evidence found and GRADE certainty

3,696 questions · 3,815 findings · 855 reviews

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No studies found 573 · 15%GRADE not reported 374 · 9.8%Very low 993 · 26%Low 1,062 · 27.8%Moderate 614 · 16.1%High 199 · 5.2%

Intervention not reported

Failure of re‐epithelialisation by day 21 post‐injury Image analysis of digital photographs · people with severe acute ocular burns

The intervention showed no clear difference in failure of re‐epithelialisation by day 21 post‐injury Image analysis… (low certainty).

1 finding from 1 review

Helium vs carbon dioxide

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · people undergoing laparoscopic general abdominal or gynaecological pelvic surgery under general anaesthesia

Helium showed no clear difference in pain scores (first postoperative day) Visual analogue scale, lower… compared with carbon dioxide (low certainty).

1 finding from 1 review

Room air vs carbon dioxide

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · people undergoing laparoscopic general abdominal or gynaecological pelvic surgery under general anaesthesia

It is very uncertain whether room air changes pain scores (first postoperative day) Visual analogue scale, lower… compared with carbon dioxide (very low certainty).

1 finding from 1 review

Nitrous oxide vs carbon dioxide

Participant‐reported pain intensity VAS (0‐10, lower score = less pain) · people undergoing laparoscopic general abdominal or gynaecological pelvic surgery under general anaesthesia

It is very uncertain whether nitrous oxide changes pain scores (first postoperative day) VAS, lower score indicates… compared with carbon dioxide (very low certainty).

1 finding from 1 review

Point‐of‐care biomarkers (procalcitonin) for infection vs usual care

Clinical recovery · people with acute respiratory infections

The review found no eligible studies for this question.

2 findings from 1 review

Point‐of‐care biomarkers (C‐reactive protein) for infection vs usual care

Clinical recovery · people with acute respiratory infections
2 findings from 1 review