Volume 129, Issue 2, Pages 429-436 (August 2005) The Perception of Cancer Risk in Patients With Prevalent Barrett’s Esophagus Enrolled in an Endoscopic Surveillance Program  Nicholas J. Shaheen, Bryan Green, Raj K. Medapalli, Kate L. Mitchell, Jeffrey T. Wei, Sarah M. Schmitz, Lindsay M. West, Alphonso Brown, Marc Noble, Shahnaz Sultan, Dawn Provenzale  Gastroenterology  Volume 129, Issue 2, Pages 429-436 (August 2005) DOI: 10.1053/j.gastro.2005.05.055 Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 1 Scale for eliciting risk perception for small risks. The magnifying glass to the left of the line allows for more precise estimation of risks of less than 1%. The directions accompanying the scale instruct the patient to “place an X in either the magnifying glass or the lower part of the scale to describe the chance that you will get cancer of the esophagus in the NEXT YEAR.” Reprinted with permission from Woloshin et al.10 Gastroenterology 2005 129, 429-436DOI: (10.1053/j.gastro.2005.05.055) Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 2 Box-and-whisker plot of patients’ risk perception based on study site. These plots summarize the reported 1-year and lifetime cancer risk estimates of patients based on site of enrollment. The span of the box represents the interquartile range of the data. The line inside the box represents the median value. The whiskers of the plot extend to a maximum of 1.5 times the interquartile range. Small squares represent outliers. Gastroenterology 2005 129, 429-436DOI: (10.1053/j.gastro.2005.05.055) Copyright © 2005 American Gastroenterological Association Terms and Conditions

Figure 3 Graph of perceived lifetime risk for cancer vs expected lifetime risk. The risk for cancer increases as patients live with the condition of BE. The lifetime risk for this cancer was estimated by applying the reported yearly risk to the patient’s life expectancy based on race, age, and sex. A perfect estimation would be all dots falling on the diagonal line. All patients to the right of the diagonal line overestimate their lifetime risk for cancer. Gastroenterology 2005 129, 429-436DOI: (10.1053/j.gastro.2005.05.055) Copyright © 2005 American Gastroenterological Association Terms and Conditions