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Study: Food Diary Data Shows Significant Link Between Fiber Intake And Lower Cancer Risk

April 20, 2010: 04:27 AM EST
The risk of colorectal cancer is apparently lowered when people eat a diet high in dietary fiber, according to a U.K. study that examined data from both food diaries and food frequency questionnaires. However, the correlation was only detected in the data from the food diaries. The discrepancy led the scientists to posit that previous inconsistent studies were marred by the questionnaire-based methodology. The new food diary-based study, part of seven U.K. cohort studies, included patients with and without colorectal cancer. Those whose diaries showed they consumed 24 grams of dietary fiber a day had a 30 percent lower risk of developing colorectal cancer. The food questionnaire data, however, showed no association between fiber and cancer risk and “may account for the lack of convincing evidence … in some previous studies.”
Christina C. Dahm, Ruth H. Keogh, Elizabeth A. Spencer, Darren C. Greenwood, Tim J. Key, Ian S. Fentiman, Martin J. Shipley, Eric J. Brunner, Janet E. Cade, Victoria J. Burley, Gita Mishra, Alison M. Stephen, Diana Kuh, Ian R. White, Robert Luben, Marleen, "Dietary Fiber and Colorectal Cancer Risk: A Nested Case–Control Study Using Food Diaries", Journal of the National Cancer Institute, April 20, 2010, © Oxford University Press
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