All‐cause mortality · Adults with chronic kidney disease not requiring dialysis
Meta-analysis of randomised trials of vitamin D supplementation for Mortality: RR 1.40 (95% CI 0.38 to 5.15), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.
1 finding from 1 review
All‐cause mortality · Adults with chronic kidney disease requiring dialysis
Meta-analysis of randomised trials of vitamin D supplementation for Mortality: RR 1.34 (95% CI 0.34 to 5.24), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.
1 finding from 1 review
All‐cause 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…
It is very uncertain whether altered fractionation radiotherapy (hyperfractionated and/or… changes mortality compared with conventional (standard) fractionation radiotherapy (very low certainty).
2 findings from 1 review
Total mortality · Adults with oral cavity or oropharyngeal cancer
It is very uncertain whether surgery plus radiotherapy changes total mortality compared with radiotherapy alone (very low certainty).
1 finding from 1 review
Total mortality · Adults with oral cavity cancer
1 finding from 1 review
Total mortality: 2 trials reported HR but could not be pooled (different surgical procedures); neither indicated a difference (BHNCSG 1998 HR 1.14, 0.70 to 1.86; Bier 1994 HR 0.87, 0.41 to 1.83); 252 participants (2…
2 studies · 252 participants
Very low
Total mortality · Adults with oropharyngeal cancer
Surgery showed no clear difference in total mortality compared with radiotherapy alone (low certainty).
1 finding from 1 review
Total mortality · Adults with oral cavity or oropharyngeal cancer
1 finding from 1 review
Total mortality: study reported survival significantly better with surgery and RT vs chemoradiotherapy, but no useable data; 32 participants (1 RCT, Iyer 2015 oral cavity subgroup).
1 study · 32 participants
Very low
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
Total mortality · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes
The review found no eligible studies for this question.
1 finding from 1 review
Total mortality · Adults with oral cavity or oropharyngeal cancer
Sentinel node biopsy (neck dissection only if biopsy positive) showed no clear difference in total mortality compared with elective neck dissection (low certainty).
1 finding from 1 review
Total mortality · Adults with oral cavity or oropharyngeal cancer
1 finding from 1 review
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…
1 finding from 1 review
Hyperfractionated/accelerated split course vs accelerated boost (Fu 1995, feasibility study, 75 participants): authors report no significant difference in total mortality; data not presented in a way that allows…
1 study · 75 participants
GRADE not reported
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 radiotherapy with concomitant boost showed no clear difference in total mortality compared with conventional (standard) fractionation radiotherapy; GRADE not reported.
1 finding from 1 review
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 radiotherapy led to lower total mortality compared with conventional (standard) fractionation radiotherapy; GRADE not reported.
1 finding from 1 review
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…
1 finding from 1 review
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…
Higher total dose radiotherapy (76.8 Gy over 6.4 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
HR 1.08 [0.69, 1.70]
1 study
GRADE not reported
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/split-course radiotherapy showed no clear difference in total mortality compared with conventional (standard) fractionation radiotherapy; GRADE not reported.
1 finding from 1 review
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
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…
Split-course radiotherapy showed no clear difference in total mortality compared with accelerated radiotherapy; GRADE not reported.
1 finding from 1 review
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…
Mixed beam (neutron and photon) radiotherapy showed no clear difference in total mortality compared with conventional photon radiotherapy; GRADE not reported.
1 finding from 1 review