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Population study: cases vs controls

5,109 German bowel cancer patients vs 4,134 without: more meat went with more cancer

Chen and colleagues · Nutrients · 2022

Original title: Red and Processed Meat Intake, Polygenic Risk Score, and Colorectal Cancer Risk.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Points to harm

Red and processed meat was linked to 19% (95% CI 1% to 41%), 41% (18% to 70%), and 73% (30% to 132%) higher bowel cancer risk at rising intakes. The link held at all gene risk levels.

The study at a glance

Type of study
Population study: cases vs controls
Who or what was studied
9,243 people · 5109 German people with bowel cancer and 4134 without
What was tested
Eating red and processed meat multiple times a week, once a day, or more, vs once a week or less
What it measured
The question itself: cancer, heart disease and death
Who has a stake
No stake declared
No competing interests declared; funders had no role.
Journal
Nutrients, 2022
Source
PubMed record 35268052. This page is based on the abstract only.

How much this study counts

  • –Shows a link, not a cause. It compares people who already had the outcome with people who did not, and may rely on memory.
  • •9,243 people.
  • ✓Measured the question itself: cancer, heart disease and death.
  • ✓No competing interests declared.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: cancer and heart disease

    0

    Not done yet. This is the step that would answer the question.

  2. Trials in people: other measures

    0

    None among the papers we read.

  3. Trials in people: lab tests or safety

    6

    2 benefit, 4 harm

  4. Population studies

    12

    1 benefit, 2 mixed, 1 no difference, 8 harm

    ↑ This study is the ringed dot

  5. Blood levels and genes

    0

    None among the papers we read.

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Does red meat raise cancer and heart disease risk?”

Linked to higher risk, especially processed meat.

Confidence: low. Based on 30 on-topic papers.

Read the full answer

Of the other 11 papers on the same step: 1 benefit, 2 mixed, 1 no difference, 7 harm. This one found harm. It agrees with most of them.

Other papers on the same step

See all 30 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads agreed on every checked field. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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