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. Author manuscript; available in PMC: 2007 May 2.
Published in final edited form as: Am J Gastroenterol. 2006 Dec 11;102(2):380–390. doi: 10.1111/j.1572-0241.2006.00970.x

Figure 2.

Figure 2

Two-way sensitivity analysis: Cost of virtual versus optical colonoscopy. The graph represents the incremental cost-effectiveness of 3-D CT colonography every 5 yr versus optical colonoscopy every 10 yr. 3-D CT colonography is more effective than optical colonoscopy. The diamond-checked area shows a region where CT colonography is less expensive (and thus dominant, being more effective and less expensive) than optical colonoscopy. The square-checked area shows a region where CT colonography costs more than optical colonoscopy; the solid lines show two commonly cited thresholds of cost-effectiveness ($50,000 and $100,000 per life-year gained). The costs used in the base case analysis are represented by the dotted lines (incremental cost-effectiveness ratio = $156,000 per life-year gained).