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 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

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

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

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 · 652 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
  2 studies · 983 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 · 709 participants
  Low

Dietary interventions vs control

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

• 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

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

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