Findings

What do systematic reviews say?

8 questions · 8 findings · 2 reviews · Dental caries

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No studies found 0 · 0%GRADE not reported 4 · 50%Very low 1 · 12.5%Low 0 · 0%Moderate 3 · 37.5%High 0 · 0%

Concomitant (concurrent) chemoradiotherapy vs Radiotherapy alone

Locoregional control · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer

Concomitant (concurrent) chemoradiotherapy led to lower locoregional control, concurrent chemoradiotherapy (platinum +… compared with radiotherapy alone (non-resectable tumours); GRADE not reported.

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancer: chemotherapy 2021 · Cochrane All outcomes
RR 0.75 [0.61, 0.93]
3 studies
GRADE not reported

Concomitant (concurrent) chemoradiotherapy vs Radiotherapy alone

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

Concomitant (concurrent) chemoradiotherapy led to lower disease-free survival, concurrent chemoradiotherapy vs radiotherapy… compared with radiotherapy alone (non-resectable tumours); GRADE not reported.

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancer: chemotherapy 2021 · Cochrane All outcomes
HR 0.74 [0.67, 0.80]
13 studies
GRADE not reported

Concomitant (concurrent) chemoradiotherapy vs Radiotherapy alone

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

Concomitant (concurrent) chemoradiotherapy probably leads to lower overall survival, concurrent chemoradiotherapy vs radiotherapy alone… compared with radiotherapy alone (non-resectable tumours) (moderate certainty).

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancer: chemotherapy 2021 · Cochrane All outcomes
HR 0.74 [0.67, 0.83]
24 studies · 2852 participants
Moderate

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Recurrence · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancers: surgical treatment 2023 · Cochrane All outcomes
Recurrence: outcome not reported in a usable way (Mehanna 2017: nodal recurrence 3 vs 1; distant metastases 21 vs 23).
1 study
GRADE not reported

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Total mortality · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)

PET-CT following chemoradiotherapy (neck dissection only if… showed no clear difference in total mortality compared with planned neck dissection before or after chemoradiotherapy (moderate certainty).

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancers: surgical treatment 2023 · Cochrane All outcomes
3 years
HR 0.92 [0.65, 1.31]
1 study · 564 participants
Moderate

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Locoregional recurrence · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)

PET-CT following chemoradiotherapy (neck dissection only if… showed no clear difference in locoregional recurrence compared with planned neck dissection before or after chemoradiotherapy (moderate certainty).

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancers: surgical treatment 2023 · Cochrane All outcomes
3 years
HR 1.00 [0.94, 1.06]
1 study · 564 participants
Moderate

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancers: surgical treatment 2023 · Cochrane All outcomes
Adverse events: 22 surgical complications in the PET-CT group vs 83 in the planned-surgery group (Mehanna 2017).
1 study · 564 participants
Very low

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Disease-free survival · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)

1 finding from 1 review

Interventions for the treatment of oral cavity and oropharyngeal cancers: surgical treatment 2023 · Cochrane All outcomes
Disease-free survival: outcome not reported in a usable way (Mehanna 2017: disease-specific and other-cause mortality did not differ, P=0.80 and 0.41).
1 study
GRADE not reported