Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,066 questions · 1,120 findings · 99 reviews

No studies found 277 · 24.7%GRADE not reported 119 · 10.6%Very low 292 · 26.1%Low 274 · 24.5%Moderate 112 · 10%High 46 · 4.1%

Intervention diet vs usual on‐treatment diet

Diarrhoea (grade 2+) · People undergoing pelvic radiotherapy for urological, gynaecological or colorectal cancer

Summary of findings: Diet interventions showed no clear difference in diarrhoea (grade 2+) compared with usual on‐treatment diet (low certainty).

1 finding from 1 review

Intervention diet vs usual on‐treatment diet

QoL · People undergoing pelvic radiotherapy for urological, gynaecological or colorectal cancer

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

3 findings from 1 review

Intervention diet vs usual on‐treatment diet

Diarrhoea (grade 1+) · People undergoing pelvic radiotherapy for urological, gynaecological or colorectal cancer

Summary of findings: Diet interventions showed no clear difference in diarrhoea (grade 1+) compared with usual on‐treatment diet (low certainty).

1 finding from 1 review

Intervention diet vs usual on‐treatment diet

Mean GI symptom scores (Vaizey scale) (higher scores better) · People undergoing pelvic radiotherapy for urological, gynaecological or colorectal cancer

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).

1 finding from 1 review

Ketogenic diet (KD) vs usual care

Seizure freedom · children (aged 1 to 18 years) with drug‐resistant epilepsy

It is very uncertain whether ketogenic diet (KD) changes seizure freedom (100% reduction in seizure frequency) compared with usual care (very low certainty).

1 finding from 1 review

Ketogenic diet (KD) vs usual care

Treatment withdrawal · adults (aged 16 years and over) with drug‐resistant epilepsy

It is very uncertain whether ketogenic diet (KD) changes treatment withdrawal compared with usual care (very low certainty).

1 finding from 1 review