Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,106 questions · 1,152 findings · 69 reviews

No studies found 216 · 18.8%GRADE not reported 448 · 38.9%Very low 122 · 10.6%Low 195 · 16.9%Moderate 127 · 11%High 44 · 3.8%

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

Altered fractionation radiotherapy vs Chemoradiotherapy (concurrent, standard fractionation)

Outcome not reported · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

The review found no eligible studies for this question.

1 finding from 1 review

Accelerated/split-course radiotherapy vs Conventional (standard) fractionation radiotherapy

Total mortality · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Accelerated/split-course radiotherapy showed no clear difference in total mortality compared with conventional (standard) fractionation radiotherapy; GRADE not reported.

1 finding from 1 review

Low dose rate interstitial radiotherapy vs High dose rate interstitial radiotherapy

Locoregional control · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Low dose rate interstitial radiotherapy showed no clear difference in locoregional control compared with high dose rate interstitial radiotherapy; GRADE not reported.

1 finding from 1 review

Intensity modulated radiotherapy (IMRT) vs Conventional or other radiotherapy

Outcome not reported · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

The review found no eligible studies for this question.

1 finding from 1 review