What do systematic reviews say?

Daily conventionally fractionated radiotherapy vs supportive care

• External beam radiation dose escalation for high grade glioma 2020 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 289 participants
  GRADE not reported

Hypofractionated radiotherapy vs daily conventionally fractionated radiotherapy

• External beam radiation dose escalation for high grade glioma 2020 · Cochrane Headline outcomes only
  no estimate extracted
  4 studies · 848 participants
  GRADE not reported

Summary of findings: Higher bladder volume vs lower bladder volume

The review found no eligible studies for this question.

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: Higher bladder volume vs lower bladder volume

Summary of findings: Higher bladder volume showed no clear difference in acute and late GI toxicity (grade 2+) compared with lower bladder volume (low certainty).

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  RR 2.22 [0.62, 7.93]
  1 study · 110 participants
  Low

Summary of findings: Higher bladder volume vs lower bladder volume

The review found no eligible studies for this question.

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: Higher bladder volume vs lower bladder volume

The review found no eligible studies for this question.

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intervention not reported

It is very uncertain whether the intervention changes intervention: high‐dose radiotherapy Comparison: low‐dose… (very low certainty).

• Long‐term neurocognitive and other side effects of radiotherapy, with or without chemotherapy, for glioma 2019 · Cochrane Headline outcomes only
  RR 0.53 [0.06, 4.85]
  1 study · 65 participants
  Very low

Intervention not reported

It is very uncertain whether the intervention changes intervention: high‐dose radiotherapy Comparison: low‐dose… (very low certainty).

• Long‐term neurocognitive and other side effects of radiotherapy, with or without chemotherapy, for glioma 2019 · Cochrane Headline outcomes only
  RR 0.16 [0.01, 3.2]
  1 study · 38 participants
  Very low

Intervention diet vs usual on‐treatment diet

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 50 participants
  Low

Intervention diet vs usual on‐treatment diet

Summary of findings: Diet interventions showed no clear difference in QOL scores (IBDQ) (higher scores better) compared with usual on‐treatment diet (low certainty).

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  MD 4.6
  1 study · 50 participants
  Low

Intervention diet vs usual on‐treatment diet

The review found no eligible studies for this question.

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intervention diet vs usual on‐treatment diet

Summary of findings: Diet interventions showed no clear difference in mean GI symptom scores (Vaizey scale) (higher scores better) compared with usual on‐treatment diet (low certainty).

• Interventions to reduce acute and late adverse gastrointestinal effects of pelvic radiotherapy for primary pelvic… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 70 participants
  Low