Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

592 questions · 604 findings · 53 reviews · Headline outcomes only

No studies found 151 · 25%GRADE not reported 31 · 5.1%Very low 94 · 15.6%Low 170 · 28.1%Moderate 114 · 18.9%High 44 · 7.3%

Hypofractionated radiotherapy vs daily conventionally fractionated radiotherapy

Overall survival for subgroup age 60 years and older glioblastoma · high‐grade glioma

Hypofractionated radiotherapy showed no clear difference in overall survival for subgroup aged ≥ 60 years glioblastoma compared with daily conventionally fractionated radiotherapy (high certainty).

1 finding from 1 review

Preoperative radiotherapy vs surgery

Overall mortality ‐ only total mesorectal excision ( · People with localised rectal carcinoma

Preoperative radiotherapy showed no clear difference in overall mortality ‐ only total mesorectal excision ( compared with surgery alone (low certainty).

1 finding from 1 review

Preoperative radiotherapy vs surgery

Postoperative morbidity ‐ sepsis (within 30 days after surgery) · People with localised rectal carcinoma

Preoperative radiotherapy may leads to higher postoperative morbidity ‐ sepsis (within 30 days after surgery) compared with surgery alone (low certainty).

1 finding from 1 review

Preoperative radiotherapy vs surgery

Postoperative morbidity ‐ surgical complications (within 30 days after surgery) · People with localised rectal carcinoma

Preoperative radiotherapy may leads to higher postoperative morbidity ‐ surgical complications (within 30 days… compared with surgery alone (low certainty).

1 finding from 1 review

Single‐fraction radiotherapy (8 Gy) vs short‐course radiotherapy (16 Gy

Ambulation · adults with metastatic extradural spinal cord compression (poor prognosis with visceral metastasis, and no spinal instability or bony…

Single‐fraction radiotherapy (8 Gy) showed no clear difference in ambulation One month after radiation compared with short‐course radiotherapy (16 Gy (moderate certainty).

1 finding from 1 review

Single‐fraction radiotherapy (8 Gy) vs short‐course radiotherapy (16 Gy

Reduction in analgesic and narcotic use One month after radiation · adults with metastatic extradural spinal cord compression (poor prognosis with visceral metastasis, and no spinal instability or bony…

Single‐fraction radiotherapy (8 Gy) showed no clear difference in reduction in analgesic and narcotic use One month after radiation compared with short‐course radiotherapy (16 Gy (moderate certainty).

1 finding from 1 review

Single‐fraction radiotherapy (8 Gy) vs short‐course radiotherapy (16 Gy

Urinary continence One month after radiation · adults with metastatic extradural spinal cord compression (poor prognosis with visceral metastasis, and no spinal instability or bony…

Single‐fraction radiotherapy (8 Gy) showed no clear difference in urinary continence One month after radiation compared with short‐course radiotherapy (16 Gy (moderate certainty).

1 finding from 1 review

Single‐fraction radiotherapy (8 Gy) vs short‐course radiotherapy (16 Gy

Local recurrence · adults with metastatic extradural spinal cord compression (poor prognosis with visceral metastasis, and no spinal instability or bony…

Single‐fraction radiotherapy (8 Gy) showed no clear difference in local recurrence MRI: compared with short‐course radiotherapy (16 Gy (low certainty).

1 finding from 1 review

Single‐fraction radiotherapy (8 Gy) vs short‐course radiotherapy (16 Gy

Adverse events Grade 3 oesophagitis, diarrhoea and nausea · adults with metastatic extradural spinal cord compression (poor prognosis with visceral metastasis, and no spinal instability or bony…

Single‐fraction radiotherapy (8 Gy) showed no clear difference in adverse events Grade 3 oesophagitis, diarrhoea and nausea compared with short‐course radiotherapy (16 Gy (moderate certainty).

1 finding from 1 review