Published online Sep 21, 2014. doi: 10.3748/wjg.v20.i35.12431
Revised: March 21, 2014
Accepted: May 29, 2014
Published online: September 21, 2014
Core tip: The hypothesis that occupational risk factors are associated with colorectal cancer is gaining ground, and high risks of colorectal cancer have been reported among workers in some industrial branches. This study investigated the epidemiologic relationship between colorectal cancer and exposures in several industrial activities, by means of a literature review and meta-analysis. Results pointed out increased risks of colorectal cancer for labourers exposed to chemical compounds, besides workers in the sector of machinery installation exposed to asbestos. Based on our results, the estimated crude excess risk fraction attributable to occupational exposure ranged from about 11% to about 15%.