Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,710 questions · 14,842 findings · 1,394 reviews

No studies found 2,880 · 19.4%GRADE not reported 1,413 · 9.5%Very low 3,103 · 20.9%Low 3,870 · 26.1%Moderate 2,663 · 17.9%High 913 · 6.2%

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Tranexamic acid vs placebo (saline solution or sterile water)

Significant adverse events (seizures, thromboembolism) within 24 hours of surgery) · adults and children with chronic rhinosinusitis with or without nasal polyps

Tranexamic acid showed no clear difference in significant adverse events (seizures, thromboembolism) within 24… compared with placebo (saline solution or sterile water) (moderate certainty).

1 finding from 1 review

Tranexamic acid vs placebo (saline solution or sterile water)

Overall rate of surgical complications · adults and children with chronic rhinosinusitis with or without nasal polyps

Tranexamic acid showed no clear difference in surgical complications compared with placebo (saline solution or sterile water) (moderate certainty).

1 finding from 1 review

Tranexamic acid vs placebo (saline solution or sterile water)

Postoperative bleeding (place of packing or revision surgery within 14 days of surgery) · adults and children with chronic rhinosinusitis with or without nasal polyps

Tranexamic acid showed no clear difference in postoperative bleeding (place of packing or revision surgery within… compared with placebo (saline solution or sterile water) (low certainty).

1 finding from 1 review

Synbiotic vs placebo

Severity of pain (at study end, using the Faces Pain Scale) · children (4 to 18 years) with functional abdominal pain disorders

It is very uncertain whether synbiotic changes severity of pain (at study end, using the Faces Pain Scale) compared with placebo (very low certainty).

1 finding from 1 review