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Competing-Risk Nomogram for Predicting Cancer-Specific Survival in Multiple Primary Colorectal Cancer Patients after Surgery
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Systematic Analysis of the Differential Effects of Red Meat on Colorectal Cancer Risks: A Meta-Analytic Approach.
Jun Yu Woon1, Gihani Vidanapathirana1,2, Alfred K Lam3,4
1School of Medicine and Dentistry, Griffith University, Gold Coast Campus, Southport, Gold Coast, QLD, 4222, Australia.
Journal of Gastrointestinal Cancer
|August 7, 2025
Summary
Red meat consumption, including beef and pork, is linked to a higher risk of colorectal cancer (CRC). This meta-analysis highlights the need for lifestyle-inclusive cancer prevention strategies.
Area of Science:
- Oncology
- Nutritional Epidemiology
- Public Health
Background:
- Colorectal cancer (CRC) incidence is rising globally, particularly in younger demographics.
- Dietary factors, specifically red meat consumption, are under investigation as potential CRC risk factors, but evidence is inconsistent.
- Understanding these associations is crucial for public health guidance and cancer prevention strategies.
Purpose of the Study:
- To systematically review and meta-analyze the association between beef, pork, and lamb consumption and the risk of colorectal cancer (CRC), colon cancer (CC), and rectal cancer (RC).
- To quantify the risk associated with consuming different types of red meat.
- To explore potential sources of heterogeneity in study findings.
Main Methods:
- A systematic review and meta-analysis of 27 studies published between 1993 and 2024.
- Inclusion of over 1 million participants from diverse geographical regions.
- Calculation of relative risks using random-effects meta-analysis, with subgroup and meta-regression analyses.
Main Results:
- Beef consumption showed a significant association with increased CRC risk (30% increase).
- Pork consumption was linked to a 17% increased CRC risk, while lamb consumption showed a weaker association (11% increase) based on limited data.
- Study design and adjustments for physical activity significantly influenced reported risk estimates, with case-control studies showing stronger associations.
Conclusions:
- Findings support current dietary guidelines advising limited red meat intake.
- The complex relationship between diet and cancer necessitates comprehensive, lifestyle-inclusive prevention strategies.
- Further research should prioritize accounting for multiple lifestyle factors in dietary-cancer association studies.
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