Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

336 questions · 427 findings · 28 reviews · Dental caries

No studies found 48 · 11.2%GRADE not reported 284 · 66.5%Very low 46 · 10.8%Low 25 · 5.9%Moderate 24 · 5.6%High 0 · 0%

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

Hyperfractionated/accelerated split-course radiotherapy vs Accelerated radiotherapy with concomitant boost

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…
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

Lower total dose radiotherapy (67.2 Gy over 5.6 weeks) vs conventional dose RT

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…

Lower total dose radiotherapy (67.2 Gy over 5.6 weeks) showed no clear difference in total mortality compared with conventional/standard total dose radiotherapy (72 Gy); GRADE not reported.

1 finding from 1 review

Pre-operative radiotherapy (plus surgery) vs surgery

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…

Pre-operative radiotherapy (plus surgery) showed no clear difference in total mortality compared with surgery alone; GRADE not reported.

1 finding from 1 review

Accelerated radiotherapy (no split, boost or hyperfractionation) vs Conventional (standard) fractionation 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…
1 finding from 1 review

Higher total dose radiotherapy (76.8 Gy over 6.4 weeks) vs conventional dose RT

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…

Higher total dose radiotherapy (76.8 Gy over 6.4 weeks) showed no clear difference in locoregional control compared with conventional/standard total dose radiotherapy (72 Gy); GRADE not reported.

1 finding from 1 review

Hyperfractionated/accelerated/split-course radiotherapy vs Conventional (standard) fractionation 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…

Hyperfractionated/accelerated/split-course radiotherapy showed no clear difference in locoregional control compared with conventional (standard) fractionation radiotherapy; GRADE not reported.

1 finding from 1 review

Altered fractionation radiotherapy (hyperfractionated and/or accelerated) 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…

Hyperfractionated/accelerated radiotherapy showed no clear difference in total mortality compared with conventional (standard) fractionation radiotherapy; GRADE not reported.

1 finding from 1 review

Pre-operative and post-operative radiotherapy vs Post-operative radiotherapy alone

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…

Pre-operative and post-operative radiotherapy showed no clear difference in total mortality compared with post-operative radiotherapy alone; GRADE not reported.

1 finding from 1 review

Altered fractionation radiotherapy plus chemotherapy vs Chemoradiotherapy with standard (conventional) 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 radiotherapy (no split, boost or hyperfractionation) vs Conventional (standard) fractionation 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…
1 finding from 1 review

Hyperfractionated/accelerated split-course radiotherapy vs Accelerated radiotherapy with concomitant boost

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…
1 finding from 1 review

Pre-operative radiotherapy (plus surgery) vs surgery

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…

Pre-operative radiotherapy (plus surgery) showed no clear difference in locoregional control compared with surgery alone; GRADE not reported.

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