Table 2.

Effectiveness and Costs of Screening

Test	Lifetime Cancer Risk	Lifetime Cancer Mortality	Life Expectancy*	Lifetime Costs*	Cost-Effectiveness (vs No Screening)
No screening	0.056	0.021	17.1215	$1,240	–
2-D CT colonography every 5 yrs	0.016	0.005	17.1738	$1,990	$14,290
2-D CT colonography every 10 yrs	0.027	0.009	17.1536	$1,800	$17,280
3-D CT colonography every 5 yr	0.013	0.004	17.1766	$1,980	$13,460
3-D CT colonography every 10 yr	0.023	0.008	17.1655	$1,600	$8,150
FOBT annually	0.038	0.012	17.1504	$1,400	$5,360
Sigmoidoscopy every 5 yrs	0.031	0.012	17.1528	$1,990	$23,830
FOBT annually + Sigmoidoscopy every 5 yrs	0.022	0.006	17.1719	$2,140	$18,000
Optical colonoscopy every 10 yrs	0.012	0.004	17.1746	$1,670	$8,090

^*Life expectancy and lifetime costs discounted at 3% annually.