1. Cost Effectiveness of Colonoscopy, Based on the Appropriateness of an Indication 
Cesare Hassan, Emilio Di Giulio, Perry J. Pickhardt, Angelo Zullo, Andrea Laghi, David H. Kim, Franco Iafrate, Sergio Morini 
Clinical Gastroenterology and Hepatology 
Volume 6, Issue 11, Pages (November 2008)
DOI: /j.cgh
Copyright © 2008 AGA Institute Terms and Conditions

2. Figure 1
Decision-tree that models for the decision of whether or not to refer a patient with an appropriate or inappropriate indication for colonoscopy. A triangle at the end of a course signifies that the patient will remain in this state until the end of the study period. In the no-endoscopy strategy, a cancer progression (upstaging) was simulated to represent the clinical impact of a diagnostic delay.
Clinical Gastroenterology and Hepatology 2008 6, DOI: ( /j.cgh )
Copyright © 2008 AGA Institute Terms and Conditions

3. Figure 2
Sensitivity analysis for inappropriate colonoscopy. The ICER and the number of colonoscopies needed to detect one cancer according to the prevalence of CRC. Points A, B, and C correspond to the prevalence values at the sensitivity analysis that increase the ICER of performing a colonoscopy to values higher than $50,000, $100,000, and $150,000, respectively.
Clinical Gastroenterology and Hepatology 2008 6, DOI: ( /j.cgh )
Copyright © 2008 AGA Institute Terms and Conditions