Cohort study on association between colorectal cancer and colorectal polypi

  Objective   In order to identify the association between colorectal cancer and colorectal polypi.

  Methods   Based on the screening for CRC among residents aged 30 and over 30 years in 10 villages and towns of Jiashan-county in China from 1989 May to 1990 April, cohort members were followed-up for CRC from 1990 May to 1999 December.The incidence of CRC were anlyzed with different histroy of colorectal polypi, and RR estimates were given to each sex and sites by controlling age.

  Results   There were statistical significance in different history of colorectal polypi.After controlling age, there were statistical significance only in male(RR=10.79, 95% CI(3.802-30.605).

  Conclusion   Cohort study might uncover the association between colorectal polypi and colorectal cancer.