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%

Dietary interventions vs usual care

Percentage of participants reaching PASI 75 · psoriasis

Dietary intervention may leads to higher severity of psoriasis PASI 75 (the proportion of participants… compared with usual care (low certainty).

1 finding from 1 review

Dietary modifications (counselling or dietary change) vs no nutritional intervention

Diarrhoea · People undergoing RT for pelvic cancer

Dietary modification probably leads to lower diarrhoea at end of treatment compared with no nutritional intervention (moderate certainty).

1 finding from 1 review

Dietary interventions vs control

Body‐mass index (BMI) · children aged 12 to 18 years
3 findings from 1 review