Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

254 questions · 276 findings · 23 reviews

No studies found 62 · 22.5%GRADE not reported 88 · 31.9%Very low 43 · 15.6%Low 43 · 15.6%Moderate 36 · 13%High 4 · 1.4%

Neutron radiotherapy vs Conventional photon radiotherapy

Disease-free survival · 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…

Neutron radiotherapy showed no clear difference in disease free survival compared with conventional photon radiotherapy; GRADE not reported.

1 finding from 1 review

Neutron radiotherapy vs Conventional photon 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…

Neutron radiotherapy showed no clear difference in locoregional control compared with conventional photon radiotherapy; GRADE not reported.

1 finding from 1 review

Radiotherapy (morning) vs Afternoon 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…

Morning radiotherapy showed no clear difference in total mortality compared with afternoon radiotherapy; GRADE not reported.

1 finding from 1 review

Neutron radiotherapy vs Conventional photon 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…

Neutron radiotherapy showed no clear difference in total mortality compared with conventional photon radiotherapy; GRADE not reported.

1 finding from 1 review

Radiotherapy (morning) vs Afternoon radiotherapy

Quality of life · 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…
1 finding from 1 review

Radiotherapy (morning) vs Afternoon 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…

Morning radiotherapy showed no clear difference in locoregional control compared with afternoon radiotherapy; GRADE not reported.

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

Surgery +/- radiotherapy + (adjuvant) chemotherapy vs Surgery +/- radiotherapy alone (observation or adjuvant radiotherapy only)

Disease-free survival · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer

Surgery +/- radiotherapy + (adjuvant) chemotherapy led to lower disease-free survival, adjuvant concurrent chemoradiation vs… compared with surgery +/- radiotherapy alone (observation or adjuvant radiotherapy…; GRADE not reported.

1 finding from 1 review

Surgery +/- radiotherapy + (adjuvant) chemotherapy vs Surgery +/- radiotherapy alone (observation or adjuvant radiotherapy only)

Overall survival, adjuvant concomitant chemoradiotherapy vs post-surgery radiotherapy alone · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer

Surgery +/- radiotherapy + (adjuvant) chemotherapy probably leads to lower overall survival, adjuvant concurrent chemoradiation vs adjuvant… compared with surgery +/- radiotherapy alone (observation or adjuvant radiotherapy… (moderate certainty).

1 finding from 1 review

Laminectomy plus radiotherapy vs radiotherapy

Ambulation · adults with metastatic extradural spinal cord compression (single lesion, no prior radiotherapy, fit for surgery)

It is very uncertain whether laminectomy plus radiotherapy changes ambulation At four months compared with radiotherapy (very low certainty).

1 finding from 1 review

Laminectomy plus radiotherapy vs radiotherapy

Survival At four months · adults with metastatic extradural spinal cord compression (single lesion, no prior radiotherapy, fit for surgery)

It is very uncertain whether laminectomy plus radiotherapy changes survival At four months compared with radiotherapy (very low certainty).

1 finding from 1 review

Laminectomy plus radiotherapy vs radiotherapy

Reduced use of analgesics · adults with metastatic extradural spinal cord compression (single lesion, no prior radiotherapy, fit for surgery)

It is very uncertain whether laminectomy plus radiotherapy changes reduction in analgesic use compared with radiotherapy (very low certainty).

1 finding from 1 review

Laminectomy plus radiotherapy vs radiotherapy

Urinary continence One month after radiation · adults with metastatic extradural spinal cord compression (single lesion, no prior radiotherapy, fit for surgery)

It is very uncertain whether laminectomy plus radiotherapy changes urinary continence One month after treatment compared with radiotherapy (very low certainty).

1 finding from 1 review