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What do systematic reviews say?

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Evidence found and GRADE certainty

3,372 questions · 3,874 findings · 666 reviews

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No studies found 431 · 11.1%GRADE not reported 783 · 20.2%Very low 995 · 25.7%Low 909 · 23.5%Moderate 596 · 15.4%High 160 · 4.1%

Intervention diet vs control diet

Remission · Patients with active Crohn's disease

It is very uncertain whether intervention diet changes induction of remission at 4 weeks ‐ High‐fiber, low refined… compared with control diet (very low certainty).

2 findings from 1 review

Intervention not reported

Quality of life (QoL) Inflammatory Bowel Disease Questionnaire (IBDQ) (scale: 32 to 224; higher score = better QoL) · Patients with active Crohn's disease
1 finding from 1 review

Intervention not reported

Intervention: high‐dose radiotherapy Comparison: low‐dose radiotherapy Outcome: neurocognitive impairment at 2 years after treatment · people with glioma surviving at least two years

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

1 finding from 1 review

Intervention not reported

Intervention: high‐dose radiotherapy Comparison: low‐dose radiotherapy Outcome: neurocognitive impairment at 5 years after treatment · people with glioma surviving at least two years

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

1 finding from 1 review

Interventions for involving patients in decision‐making about their health care vs attention control

Health status (a) Patient‐reported high self‐rated health at 6 months after baseline CDC Healthy Days Measure (CDC 2000): dichotomised as low (1 to 3) and high (4 to 5) · older patients with multi‐morbidity
1 finding from 1 review

Interventions for involving older patients with multi‐morbidity in decision‐making about their health care vs usual care

Health status (a) Patient‐reported high self‐rated health at 6 months after baseline CDC Healthy Days Measure (CDC 2000): dichotomised as low (1 to 3) and high (4 to 5) · older patients with multi‐morbidity

It is very uncertain whether interventions for involving older patients with multi‐morbidity in… changes health status (a) Patient‐reported high self‐rated health at 6… compared with usual care (very low certainty).

1 finding from 1 review