US Pharm. 2011;36(9):HS-39-HS-40. 

Smokers might be at higher risk of dying from colon cancer, a study suggests. The results, reported in Cancer, show that smokers were 30% more likely to die of colon cancer during the study and 50% more likely to die of any cause than their nonsmoking peers. Those who had once smoked but had quit also had worse survival odds than nonsmoking peers, but they had a better outlook than current smokers. Of 920 nonsmokers, 22% died of colon cancer during the study. That compared with 30% of those who were current smokers around the time of their cancer diagnosis, and with 25% of former smokers.