Colon-cancer and dietary habits - a case-control study.

Area of Science:

• Epidemiology
• Nutritional Science
• Oncology

Background:

• Colon cancer (colorectal carcinoma) is a significant global health concern.
• Dietary factors are recognized as crucial in the development of colon cancer.
• Understanding specific food item impacts is vital for prevention strategies.

Purpose of the Study:

• To investigate the association between dietary habits and colon cancer risk.
• To analyze the influence of food consumption patterns before and after age 25.
• To identify specific food items and nutrients linked to colon carcinogenesis.

Main Methods:

• A case-control study was conducted in Northern Sweden with 312 cases and 623 controls.
• Food frequency questionnaires collected data on 28 food items, assessing consumption across different life stages.
• Mantel-Haenszel odds ratios (MH-ORs) were calculated to determine risk associations.

Main Results:

• Daily cheese intake significantly reduced colon cancer risk (MH-ORs: A=0.64, B=0.41).
• Consumption of crisp bread, boiled/fried fish, and fiber-rich foods showed non-significant risk reductions.
• Tea consumption (≥2 cups daily) was associated with a reduced risk (MH-OR=0.61).
• Smoked food intake increased risk (MH-ORs: A=1.52, B=1.36), while high-fat intake showed no association.
• Foods rich in selenium and vitamin C (pre-age 25) also indicated reduced risk.

Conclusions:

• Dietary choices, including cheese, tea, and fiber, play a role in modulating colon cancer risk.
• Specific food items like smoked foods may elevate risk, warranting further investigation.
• Nutrient intake, particularly selenium and vitamin C, may offer protective benefits against colon carcinogenesis.