Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,109 questions · 1,155 findings · 70 reviews

No studies found 216 · 18.7%GRADE not reported 450 · 39%Very low 123 · 10.6%Low 195 · 16.9%Moderate 127 · 11%High 44 · 3.8%

Pre-radiotherapy extraction of healthy molar teeth vs Conservative treatment (leaving the teeth in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Overall survival · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of healthy molar teeth vs Conservative treatment (leaving the teeth in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Trismus preventing further restorative treatment · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of healthy molar teeth vs Conservative treatment (leaving the teeth in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Patients' quality of life · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of healthy molar teeth vs Conservative treatment (leaving the teeth in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Delay in start of radiation treatment · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of diseased molar teeth vs Conservative treatment (restoration of the teeth and leaving them in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Trismus preventing further restorative treatment · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of diseased molar teeth vs Conservative treatment (restoration of the teeth and leaving them in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Delay in start of radiation treatment · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of diseased molar teeth vs Conservative treatment (restoration of the teeth and leaving them in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Patients' quality of life · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

Pre-radiotherapy extraction of diseased molar teeth vs Conservative treatment (restoration of the teeth and leaving them in place during radiotherapy, with oral health education and disease prevention: oral hygiene, fluoride, diet advice)

Overall survival · Patients diagnosed with head and neck cancer planned to undergo any type of radiotherapy (external beam, intensity modulated,…

The review found no eligible studies for this question.

1 finding from 1 review

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

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