Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

158 questions · 159 findings · 17 reviews · Headline outcomes only

No studies found 40 · 25.2%GRADE not reported 15 · 9.4%Very low 33 · 20.8%Low 40 · 25.2%Moderate 27 · 17%High 4 · 2.5%

Radiotherapy vs control

Progression to visual loss (loss of 3 or more lines on logMAR chart) · people with neovascular AMD

Radiotherapy showed no clear difference in loss of 3 or more lines of best‐corrected visual acuity Measured… compared with control (low certainty).

1 finding from 1 review

Radiotherapy vs botulinum toxin

Reduction in the amount of saliva production in the short term using an objective measure · sialorrhea (excessive saliva) in people with motor neuron disease/amyotrophic lateral sclerosis

The review found no eligible studies for this question.

1 finding from 1 review

Radiotherapy vs botulinum toxin

Adverse events, reported as "negative experiences" · sialorrhea (excessive saliva) in people with motor neuron disease/amyotrophic lateral sclerosis

It is very uncertain whether radiotherapy changes adverse events, reported as "negative experiences" compared with botulinum toxin (very low certainty).

1 finding from 1 review

Radiotherapy vs surgical excision

Recurrence · adults with basal cell carcinoma of the skin

Radiotherapy may leads to higher recurrence at 3 years compared with surgical excision (with or without frozen section margin control) (low certainty).

2 findings from 1 review

Radiotherapy vs surgical excision

Cosmetic outcome (good/excellent) · adults with basal cell carcinoma of the skin

Radiotherapy probably leads to lower cosmetic outcome (good/excellent) compared with surgical excision (with or without frozen section margin control) (moderate certainty).

1 finding from 1 review