Findings

What do systematic reviews say?

600 questions · 627 findings · 57 reviews

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No studies found 131 · 20.9%GRADE not reported 91 · 14.5%Very low 167 · 26.6%Low 143 · 22.8%Moderate 76 · 12.1%High 19 · 3%

Mediterranean dietary intervention vs another dietary intervention

Systolic blood pressure (mmHg), change from baseline · adults with established cardiovascular disease

1 finding from 1 review

Mediterranean‐style diet for the primary and secondary prevention of cardiovascular disease 2019 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 150 participants
Very low

Mediterranean dietary intervention vs another dietary intervention

Diastolic blood pressure (mmHg), change from baseline · adults with established cardiovascular disease

1 finding from 1 review

Mediterranean‐style diet for the primary and secondary prevention of cardiovascular disease 2019 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 150 participants
Very low

Mediterranean dietary intervention vs another dietary intervention

Adverse events · adults with established cardiovascular disease

The review found no eligible studies for this question.

1 finding from 1 review

Mediterranean‐style diet for the primary and secondary prevention of cardiovascular disease 2019 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Dietary interventions vs physical activity interventions

Body‐mass index (BMI) · children aged 6‐12 years

1 finding from 1 review

Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 4917 participants
High

Dietary interventions vs physical activity interventions

Body‐mass index z score (zBMI) · children aged 6‐12 years

1 finding from 1 review

Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
no estimate extracted
1 study · 1205 participants
High

One-to-one dietary intervention aimed at preventing tooth erosion (e.g., reducing consumption of acidic/carbonated drinks) vs No dietary advice, or different dietary advice

Dental erosion / tooth wear (tooth wear indices) · Participants of any age receiving one-to-one dietary advice in a dental setting

The review found no eligible studies for this question.

1 finding from 1 review

One‐to‐one dietary interventions undertaken in a dental setting to change dietary behaviour 2012 · Cochrane All outcomes
There were no studies concerned with dietary change aimed at preventing tooth erosion.
0 studies
No studies found

Dietary interventions vs control

All‐cause mortality · people living beyond cancer

Dietary intervention showed no clear difference in mortality compared with control (low certainty).

1 finding from 1 review

Dietary interventions for adult cancer survivors 2019 · Cochrane Headline outcomes only
HR 0.98 [0.77, 1.23]
1 study · 3107 participants
Low

Dietary interventions vs control

Secondary cancers · people living beyond cancer

Dietary intervention showed no clear difference in secondary cancers compared with control (low certainty).

1 finding from 1 review

Dietary interventions for adult cancer survivors 2019 · Cochrane Headline outcomes only
RR 0.99 [0.84, 1.15]
1 study · 3107 participants
Low

Dietary interventions vs control

Children's fruit and vegetable intake (servings/d) Measured by food frequency questionnaire · people living beyond cancer

1 finding from 1 review

Dietary interventions for adult cancer survivors 2019 · Cochrane Headline outcomes only
no estimate extracted
5 studies · 834 participants
Moderate

Dietary interventions vs control

Fibre intake assessed as g · people living beyond cancer

1 finding from 1 review

Dietary interventions for adult cancer survivors 2019 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 3127 participants
Very low

Dietary interventions vs control

Body‐mass index (BMI) · people living beyond cancer

1 finding from 1 review

Dietary interventions for adult cancer survivors 2019 · Cochrane Headline outcomes only
no estimate extracted
4 studies · 777 participants
Moderate

Dietary interventions vs control

Waist‐to‐hip circumference assessed as cm · people living beyond cancer

1 finding from 1 review

Dietary interventions for adult cancer survivors 2019 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 106 participants
Low

Dietary interventions vs standard practice

School achievement: Average achievement across subjects taught at school · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 382 participants
Low

Dietary interventions vs standard practice

School achievement: Mathematics · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
1 study · 76 participants
Low

Dietary interventions vs standard practice

School achievement: Reading · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
1 study · 67 participants
Low

Dietary interventions vs standard practice

School achievement: Additional educational support needs · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Dietary interventions vs standard practice

Cognitive function: Composite executive functions · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Dietary interventions vs standard practice

Cognitive function: Inhibition control · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Dietary interventions vs standard practice

Adverse events · Children and adolescents with obesity or overweight

1 finding from 1 review

Physical activity, diet and other behavioural interventions for improving cognition and school achievement in children… 2018 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Vegan dietary intervention vs no intervention or minimal intervention

CVD events ‐ not reported · people at high risk of CVD

The review found no eligible studies for this question.

1 finding from 1 review

Vegan dietary pattern for the primary and secondary prevention of cardiovascular diseases 2021 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found