Index-based Dietary Patterns and Risk of Colorectal Cancer

• Published in: American journal of epidemiology Vol. 168; no. 1; pp. 38 - 48
• Main Authors: Reedy, J., Mitrou, P. N., Krebs-Smith, S. M., Wirfält, E., Flood, A., Kipnis, V., Leitzmann, M., Mouw, T., Hollenbeck, A., Schatzkin, A., Subar, A. F.
• Format: Journal Article
• Language: English
• Published: Oxford University Press 01.07.2008
• Subjects: colorectal neoplasms; Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi; food habits; Health Sciences; Hälsovetenskap; Medical and Health Sciences; Medicin och hälsovetenskap; Public Health, Global Health, Social Medicine and Epidemiology; risk; MED; food habits; colorectal neoplasms; risk
• ISSN: 0002-9262; 1476-6256
• DOI: 10.1093/aje/kwn097

The authors compared how four indexes—the Healthy Eating Index-2005, Alternate Healthy Eating Index, Mediterranean Diet Score, and Recommended Food Score—are associated with colorectal cancer in the National Institutes of Health-AARP Diet and Health Study (n = 492,382). To calculate each score, they merged data from a 124-item food frequency questionnaire completed at study entry (1995–1996) with the MyPyramid Equivalents Database (version 1.0). Other variables included energy, nutrients, multivitamins, and alcohol. Models were stratified by sex and adjusted for age, ethnicity, education, body mass index, smoking, physical activity, and menopausal hormone therapy (in women). During 5 years of follow-up, 3,110 incident colorectal cancer cases were ascertained. Although the indexes differ in design, a similarly decreased risk of colorectal cancer was observed across all indexes for men when comparing the highest scores with the lowest: Healthy Eating Index-2005 (relative risk (RR) = 0.72, 95% confidence interval (CI): 0.62, 0.83); Alternate Healthy Eating Index (RR = 0.70, 95% CI: 0.61, 0.81); Mediterranean Diet Score (RR = 0.72, 95% CI: 0.63, 0.83); and Recommended Food Score (RR = 0.75, 95% CI: 0.65, 0.87). For women, a significantly decreased risk was found with the Healthy Eating Index-2005, although Alternate Healthy Eating Index results were similar. Index-based dietary patterns that are consistent with given dietary guidelines are associated with reduced risk.