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Original Article
Volume 340:169-176 January 21, 1999 Number 3
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Dietary Fiber and the Risk of Colorectal Cancer and Adenoma in Women
Charles S. Fuchs, M.D., Edward L. Giovannucci, M.D., Graham A. Colditz, M.D., David J. Hunter, M.B., B.S., Meir J. Stampfer, M.D., Bernard Rosner, Ph.D., Frank E. Speizer, M.D., and Walter C. Willett, M.D.

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ABSTRACT

Background A high intake of dietary fiber has been thought to reduce the risk of colorectal cancer and adenoma.

Methods We conducted a prospective study of 88,757 women, who were 34 to 59 years old and had no history of cancer, inflammatory bowel disease, or familial polyposis, who completed a dietary questionnaire in 1980. During a 16-year follow-up period, 787 cases of colorectal cancer were documented. In addition, 1012 patients with adenomas of the distal colon and rectum were found among 27,530 participants who underwent endoscopy during the follow-up period.

Results After adjustment for age, established risk factors, and total energy intake, we found no association between the intake of dietary fiber and the risk of colorectal cancer; the relative risk for the highest as compared with the lowest quintile group with respect to fiber intake was 0.95 (95 percent confidence interval, 0.73 to 1.25). No protective effect of dietary fiber was observed when we omitted adjustment for total energy intake, when events during the first six years of follow-up were excluded, or when we excluded women who altered their fiber intake during the follow-up period. No significant association between fiber intake and the risk of colorectal adenoma was found.

Conclusions Our data do not support the existence of an important protective effect of dietary fiber against colorectal cancer or adenoma.


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From the Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School (C.S.F., E.L.G., G.A.C., D.J.H., M.J.S., B.R., F.E.S., W.C.W.); the Department of Adult Oncology, Dana–Farber Cancer Institute (C.S.F.); and the Departments of Epidemiology (G.A.C., D.J.H., M.J.S., W.C.W.), Environmental Health (F.E.S.), Nutrition (E.L.G., M.J.S., W.C.W.), and Biostatistics (B.R.), Harvard School of Public Health — all in Boston.

Address reprint requests to Dr. Fuchs at the Dana–Farber Cancer Institute, 44 Binney St., Boston, MA 02115.

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Related Letters:

Dietary Fiber and Colorectal Cancer
Ravin N. D., Mohandas K.M., Cummings J. H., Southgate D. A.T., Heaton K. W., Lewis S. J., Madar Z., Stark A., Camire M. E., Fuchs C. S., Willett W. C.
Extract | Full Text  
N Engl J Med 1999; 340:1924-1926, Jun 17, 1999. Correspondence

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