Time spent walking and risk of colorectal cancer in Japan: The Miyagi Cohort Study

Hideko Takahashi, Shinichi Kuriyama, Yoshitaka Tsubono, Naoki Nakaya, Kazuki Fujita, Yoshikazu Nishino, Daisuke Shibuya, Ichiro Tsuji

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Higher levels of physical activity have been consistently associated with a lower risk of colon cancer in earlier epidemiological studies. The specific benefits of walking, however, remain relatively unexplored. In 1990, 20 519 men and 21 469 women in Japan completed a self-administered questionnaire including a question on time spent walking per day. During 7 years of follow-up, 260 cases of colorectal cancer were documented in 305 790 person-years. We used the Cox proportional hazards regression model to estimate the relative risk of incident cancer (colorectal, colon, and rectal) according to three levels of walking. Time spent walking was inversely associated with risk of colorectal cancer incidence in men. Compared with men who walked 0.5 h or less per day, the multivariate relative risks were 1.06 (95% confidence interval 0.72-1.57) for men who walked between 0.5 and 1 h per day, and 0.57 (95% confidence interval 0.38-0.83) for men who walked 1 h or more per day (P for trend=0.003). Time spent walking per day was associated with a lower risk of colon cancer in Japanese men but not in women, and there was no association between time spent walking and the risk of rectal cancer.

Original languageEnglish
Pages (from-to)403-408
Number of pages6
JournalEuropean Journal of Cancer Prevention
Volume16
Issue number5
DOIs
Publication statusPublished - 2007 Oct

Keywords

  • Colorectal cancer
  • Incidence
  • Prospective cohort study
  • Time spent walking

ASJC Scopus subject areas

  • Epidemiology
  • Oncology
  • Public Health, Environmental and Occupational Health
  • Cancer Research

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