Fruits, vegetables, and adenomatous polyps

Stephanie A. Smith-Warner, Patricia J. Elmer, Lisa Fosdick, Bryan Randall, Roberd M. Bostick, Greg Grandits, Patricia Grambsch, Thomas A. Louis, James R. Wood, John D. Potter

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


Although high vegetable intakes have been associated with a lower risk of colorectal cancer, this relation is less well established for the precursor lesions, adenomatous polyps. With a case-control design involving adenomatous polyp cases (n = 564), colonoscopy-negative controls who were polyp free at colonoscopy (n = 682), and community controls (n = 535), this 1991-1994 Minnesota Cancer Prevention Research Unit study investigated the relation between fruit and vegetable consumption and first incident adenomatous polyps. Dietary intake was assessed using a food frequency questionnaire. For women, adenoma risk was approximately halved in the highest versus lowest quintile of juice consumption (cases vs. colonoscopy-negative controls: odds ratio (OR) = 0.50, 95% confidence interval (Cl): 0.27, 0.92; cases vs. community controls: OR = 0.56, 95% Cl: 0.30, 1.06). The association was stronger for adenomas with moderate or severe dysplasia compared with mild dysplasia. Juice was not associated with adenoma risk in men. The results for fruits, vegetables, total fruits and vegetables, green leafy vegetables, and several botanically and phytochemically defined subgroups generally were not statistically significant. Because elevated vegetable consumption has been associated with a lower risk of colorectal cancer, vegetables may have a stronger role in preventing the progression of adenomas to carcinomas rather than in preventing the initial appearance of adenomas.

Original languageEnglish (US)
Pages (from-to)1104-1113
Number of pages10
JournalAmerican journal of epidemiology
Issue number12
StatePublished - Jun 15 2002
Externally publishedYes


  • Adenoma
  • Colorectal neoplasms
  • Diet
  • Fruit
  • Vegetables

ASJC Scopus subject areas

  • General Medicine


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