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Macronutrients and colorectal cancer: a Swiss case-control study
1Registre Vaudois des Tumeurs, and Unité d'épidémiologie du cancer, Institut universitaire de médecine sociale et préventive, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. Fabio.Levi@inst.hospvd.ch
Summary
High energy intake increases colorectal cancer risk. Sugars and unsaturated fats may reduce risk, while saturated fats show a borderline increased risk. Dietary fat types play varied roles in cancer development.
Area of Science:
- Nutritional epidemiology
- Gastroenterology
- Oncology
Background:
- The relationship between diet and colorectal cancer (CRC) risk is complex and requires further definition.
- Specific macronutrient roles, including fats, proteins, and sugars, in CRC development warrant detailed investigation.
Purpose of the Study:
- To investigate the association between dietary intake of macronutrients and the risk of developing colorectal cancer.
- To clarify the specific roles of different dietary fats, sugars, and proteins in colorectal carcinogenesis.
Main Methods:
- A case-control study was conducted in the Swiss Canton of Vaud between 1992 and 2000.
- Dietary habits were assessed using a validated food frequency questionnaire in 286 colorectal cancer cases and 550 controls.
- Multivariate logistic regression analyses adjusted for age, sex, education, physical activity, and energy intake were performed.
Main Results:
- Colorectal cancer risk was positively associated with total energy intake.
- A significant inverse association was observed between sugar intake and CRC risk (OR=0.5 for highest tertile).
- Monounsaturated and polyunsaturated fat intake showed significant inverse trends (OR=0.6), while saturated fat intake showed a borderline significant direct trend (OR=1.4).
Conclusions:
- Total energy intake is a significant factor directly related to colorectal cancer risk.
- Different types of dietary fats appear to have distinct roles in the development of colorectal cancer.
- Dietary patterns, particularly fat composition and sugar intake, are important considerations in colorectal cancer prevention strategies.