Dietary fiber, source foods and colorectal cancer risk: The Fukuoka colorectal cancer study

Kazuhiro Uchida, Suminori Kono, Guang Yin, Kengo Toyomura, Jun Nagano, Tetsuya Mizoue, Ryuichi Mibu, Masao Tanaka, Yoshihiro Kakeji, Yoshihiko Maehara, Takeshi Okamura, Koji Ikejiri, Kitaroh Futami, Takafumi Maekawa, Yohichi Yasunami, Kenji Takenaka, Hitoshi Ichimiya, Reiji Terasaka

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Objective. Despite much evidence from laboratory work, epidemiological evidence remains elusive regarding the role of dietary fiber in colorectal carcinogenesis. We investigated associations of dietary fiber and source foods with colorectal cancer risk in the Fukuoka Colorectal Cancer Study, a community-based casecontrol study. Material and methods. The study subjects were 816 incident cases of colorectal cancer and 815 community controls. Nutrient and food intakes were estimated on the basis of a computer-assisted interview regarding 148 dietary items. Odds ratios of colorectal cancer according to quintile categories of energy-adjusted intakes of dietary fiber and food groups were obtained with adjustment for non-dietary factors and dietary intakes of calcium and n-3 fatty acids. Results. Total, soluble and insoluble dietary fibers were not measurably associated with overall risk or subsite-specific risk of colorectal cancer. By contrast, rice consumption was associated with a decreased risk of colorectal cancer (trend p 0.03), particularly of distal colon and rectal cancer (trend p 0.02), and high intake of non-rice cereals tended to be related to an increased risk of colon cancer (trend p 0.07). There was no association between vegetable consumption and colorectal cancer, whereas individuals with the lowest intake of fruits tended to have an increased risk of colorectal cancer. Conclusions. The present study did not corroborate a protective association between dietary fiber and colorectal cancer, but suggested a decreased risk of distal colorectal cancer associated with rice consumption.

Original languageEnglish
Pages (from-to)1223-1231
Number of pages9
JournalScandinavian Journal of Gastroenterology
Issue number10
Publication statusPublished - Oct 2010

All Science Journal Classification (ASJC) codes

  • Gastroenterology


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