1. Cigarette Smoking and the Colorectal Adenoma-Carcinoma Sequence
Julian A. Abrams, Mary Beth Terry, Alfred I. Neugut 
Gastroenterology 
Volume 134, Issue 2, Pages (February 2008)
DOI: /j.gastro
Copyright © 2008 AGA Institute Terms and Conditions

2. Figure 1
The odds ratio (OR) overestimates the relative risk (RR) to a greater degree when the outcome is common. If smoking increases the risk of adenoma formation and does not influences other steps of neoplastic progression, then the RR for adenomas will equal the RR for colorectal cancer (CRC). The OR, on the other hand, will be greater for adenomas than for CRC.
Gastroenterology  , DOI: ( /j.gastro )
Copyright © 2008 AGA Institute Terms and Conditions