Table 3.

Base Case Incremental Cost-Effectiveness Ratios for Six Screening Strategies

Screening strategy	QALYs/person	Costs/person	ΔCosts	ΔQALYs	ICERs (ΔCosts/ΔQALYs)
Annual screening, starting at age 50	18.2993	$1762	$478	0.0041	$116,640
Annual screening, starting at age 60	18.2952	$1284	–	–	WD*
Screening every 2 years, starting age 50	18.2952	$1279	$238	0.0035	$67,970
Screening every 2 years, starting age 60	18.2917	$1046	$109	0.0041	$26,503
Screening every 5 years, starting age 50	18.2889	$988	–	–	WD*
Screening every 5 years, starting at age 60	18.2876	$937	$168	0.0065	$25,915
No screening	18.2811	$769	–	–	–

*Weak dominance (WD): an alternate strategy is both more effective (higher QALYs) and has a lower ICER