Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,234 questions · 3,357 findings · 396 reviews

No studies found 803 · 23.9%GRADE not reported 270 · 8%Very low 757 · 22.5%Low 859 · 25.6%Moderate 486 · 14.5%High 182 · 5.4%

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

Summary of findings table ‐ Contact immunotherapy (diphencyprone or squaric acid dibutil ester) vs hair growth stimulants (minoxidil)

Short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of · adults with alopecia areata

It is very uncertain whether summary of findings table ‐ Contact immunotherapy (diphencyprone or… changes short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of compared with hair growth stimulants (minoxidil) (very low certainty).

1 finding from 1 review

Doxapram vs no treatment, placebo, methylxanthine (including theophylline, aminophylline, or caffeine), or

Failed apnea reduction · treatment of apnea

Doxapram showed no clear difference in 1a. Failed apnea reduction after 2–7 days – doxapram compared to no… compared with no treatment, placebo, methylxanthine (including theophylline,… (low certainty).

3 findings from 1 review