What do systematic reviews say?

Dietary fibre (all study interventions) vs control

Dietary fibre (all study interventions) showed no clear difference in number of participantswith more than one adenoma compared with control (low certainty).

• Dietary fibre for the prevention of recurrent colorectal adenomas and carcinomas 2017 · Cochrane Headline outcomes only
  RR 1.06 [0.94, 1.2]
  2 studies · 2542 participants
  Low

Dietary fibre (all study interventions) vs control

Dietary fibre (all study interventions) showed no clear difference in number of participantswith at least one adenoma 1 cm or greater compared with control (low certainty).

• Dietary fibre for the prevention of recurrent colorectal adenomas and carcinomas 2017 · Cochrane Headline outcomes only
  RR 0.99 [0.82, 1.2]
  4 studies · 3224 participants
  Low

Dietary fibre (all study interventions) vs control

Dietary fibre (all study interventions) may leads to higher number of participantsdiagnosed with colorectal cancer compared with control (low certainty).

• Dietary fibre for the prevention of recurrent colorectal adenomas and carcinomas 2017 · Cochrane Headline outcomes only
  RR 2.7 [1.07, 6.85]
  2 studies · 2794 participants
  Low

Post‐haemodialysis dietary supplement vs normal diet

• Dietary interventions for mineral and bone disorder in people with chronic kidney disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 54 participants
  Very low
• Dietary interventions for mineral and bone disorder in people with chronic kidney disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 24 participants
  Very low

Post‐haemodialysis dietary supplement vs normal diet

• Dietary interventions for mineral and bone disorder in people with chronic kidney disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 30 participants
  Very low

Income‐generation interventions vs no intervention

• Community‐level interventions for improving access to food in low‐ and middle‐income countries 2020 · Cochrane Headline outcomes only
  no estimate extracted
  4 studies · 3677 participants
  Low

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

The review found no eligible studies for this question.

• 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

Gamified oral health interventions (mobile apps, serious games, augmented reality, game-based education) vs Conventional or traditional oral health education, or non-gamified interventions (comparator varied; several studies were single-arm/uncontrolled)

Gamified interventions appear to improve oral hygiene behaviors (brushing habits, preventive dental visits) in children, but the evidence is narrative and ungraded.

• The Application of Gamification in Children's Oral Health Management: Systematic Review. 2025 All outcomes

  Post-intervention (predominantly short-term; long-term follow-up in a minority of studies) · School-based settings, specialized dental clinics, and home-based environments
  A gesture-based motion-capture game enhanced brushing independence and skill retention (P<.001) [Kang 2021]; 58.8% of caregivers reported their children brushed more often when using gamified applications [France…
  Studies not reported
  GRADE not reported

Adverse event outcomes for dietary combined with physical activity interventions vs control

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 42 participants
  Very low

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 784 participants
  Moderate
• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 724 participants
  Moderate

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 225 participants
  Low

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 285 participants
  High

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 1128 participants
  High

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 60 participants
  Low

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 4603 participants
  Moderate

Adverse event outcomes for dietary combined with physical activity interventions vs usual care or no treatment

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 60 participants
  Low

Adverse event outcomes for dietary combined with physical activity interventions vs control

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 779 participants
  High

Adverse event outcomes for dietary combined with physical activity interventions vs control

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 282 participants
  Low

Adverse event outcomes for dietary combined with physical activity interventions vs control

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 779 participants
  High

Adverse event outcomes for dietary combined with physical activity interventions vs control

• Interventions for preventing obesity in children 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 110 participants
  Very low