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Commuting physical activity and risk of colon cancer in Shanghai, China.

Colon cancer incidence rates have been rapidly increasing in Shanghai, China, for reasons still unclear. Low physical activity is a known risk factor for colon cancer. The authors examined the effects of physical activity, particularly commuting physical activity, and its joint effects with body mas...

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Published in:American Journal of Epidemiology Vol. 160; no. 9; pp. 860 - 868
Main Authors: Hou L, Ji B, Blair A, Dai Q, Gao Y, Chow W
Format: research tables/charts Journal Article
Published: Oxford University Press / USA Nov2004
Online Access:View this record in EBSCOhost
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      dt: Nov2004
      vid: 160
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      pub: Oxford University Press / USA
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        106492363
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        atl: Commuting physical activity and risk of colon cancer in Shanghai, China.
      aug:
        au:
          Hou L
          Ji B
          Blair A
          Dai Q
          Gao Y
          Chow W
        affil: Division of Cancer Epidemiology and Genetics, National Cancer Institute, 6120 Executive Boulevard, EPS 8213, Bethesda, MD 20892-7240; lifangh2@mail.nih.gov
      sug:
        subj:
          Transportation China
          Physical Activity China
          Colonic Neoplasms China
          China
          Body Mass Index Evaluation
          Case Control Studies
          Epidemiological Research
          Cancer Patients
          Random Sample
          Statistical Significance
          Odds Ratio
          Confidence Intervals
          Male
          Female
          Descriptive Statistics
          Time Factors Evaluation
          Interviews
          Questionnaires
          Energy Metabolism Evaluation
          Body Weights and Measures
          Multiple Logistic Regression
          Data Analysis Software
          Two-Tailed Test
          Adult
          Middle Age
          Aged
          Educational Status Evaluation
          Income Evaluation
          Cycling
          Walking
          Human
          Adult: 19-44 years
          Middle Aged: 45-64 years
          Aged: 65+ years
          Male
          Female
      ab: Colon cancer incidence rates have been rapidly increasing in Shanghai, China, for reasons still unclear. Low physical activity is a known risk factor for colon cancer. The authors examined the effects of physical activity, particularly commuting physical activity, and its joint effects with body mass index on colon cancer risk in a population-based, case-control study. The study included 931 incident colon cancer patients and 1,552 randomly selected controls in Shanghai between 1990 and 1993. Colon cancer risk was significantly reduced among subjects with high commuting physical activity (odds ratio (OR) = 0.52, 95% confidence interval (CI): 0.27, 0.87 for men; OR = 0.56, 95% CI: 0.21, 0.91 for women), particularly among those who had high commuting physical activity for at least 35 years (OR = 0.34, 95% CI: 0.09, 0.76 for men; OR = 0.31, 95% CI: 0.07, 0.72 for women). Commuting physical activity significantly modified the risk conferred by high body mass index, with the highest risk observed among those at the highest quintile of body mass index and the lowest activity level (OR = 6.43, 95% CI: 1.82, 8.54 for men; OR = 7.42, 95% CI: 2.84, 10.01 for women). Our results suggest that regular and frequent physical activity over a long period of time protects from colon cancer and significantly modifies the body mass index-associated risk.
      pubtype: Academic Journal
      doctype:
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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