Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

49 questions · 49 findings · 10 reviews · ENT

No studies found 8 · 16.3%GRADE not reported 0 · 0%Very low 12 · 24.5%Low 16 · 32.7%Moderate 10 · 20.4%High 3 · 6.1%

Intervention not reported

Patient‐reported disease‐specific symptom scores Symptom score with scale of 0 to 3 (0 = no symptoms, 3 = severe symptoms)

The intervention showed no clear difference in patient‐reported disease‐specific symptom scores Symptom score with… (low certainty).

1 finding from 1 review

Intervention not reported

Health‐related quality of life scores, measured by SF‐36 (range 0 to 100)

The intervention showed no clear difference in health‐related quality of life scores, measured by SF‐36 (range 0 to… (low certainty).

1 finding from 1 review

Intervention not reported

Endoscopic appearances 0 to 3 (0 = no polyps, 3 = severe polyposis)

The intervention showed no clear difference in endoscopic appearances 0 to 3 (0 = no polyps, 3 = severe polyposis) (low certainty).

1 finding from 1 review