Table 4.
Variable | Cost Per Life-Year Gained: 3-D CT Colonography (CTC) Every 5 yr* | Cost Per Life-Year Gained: 3-D CT Colonography (CTC) Every 10 Yr* |
---|---|---|
Base case | $156,000 | $7,840 |
Cost of CT colonography | ||
$200 | CTC dominant | $57,410 |
$400 | CTC dominant | $29,750 |
$600 | $198,140 | $2,100 |
$800 | $401,100 | Optical colonoscopy dominant |
$1,000 | $603,970 | Optical colonoscopy dominant |
Cost of optical colonoscopy | ||
$200 | $421,330 | Optical colonoscopy dominant |
$400 | $304,120 | Optical colonoscopy dominant |
$600 | $186,920 | Optical colonoscopy dominant |
$800 | $69,720 | $30,450 |
$1000 | CTC dominant | $61,160 |
$1200 | CTC dominant | $91,870 |
Adherence with initial screening test | ||
20% | $20,150 | $1,060 |
40% | $48,900 | $3,510 |
60% | $156,000 | $7,840 |
80% | Optical colonoscopy dominant | $13,640 |
100% | Optical colonoscopy dominant | $21,610 |
Adherence with follow-up optical colonoscopy | ||
25% | Optical colonoscopy dominant | Optical colonoscopy dominant |
50% | Optical colonoscopy dominant | Optical colonoscopy dominant |
75% | $156,000 | $7,840 |
95% | $33,210 | $107,530 |
Sensitivity of CT colonography for 1 cm adenomas | ||
60% | Optical colonoscopy dominant | Optical colonoscopy dominant |
70% | Optical colonoscopy dominant | Optical colonoscopy dominant |
80% | Optical colonoscopy dominant | $1,870 |
90% | $175,580 | $7,120 |
95% | $102,160 | $10,950 |
99% | $73,990 | $14,690 |
Bold print means that CT colonography is the more effective test; italics that optical colonoscopy every 10 yr is the more effective test. Dollar figures are incremental cost per life-year gained of the more versus less effective test. All costs and life expectancy discounted at 3%.