Table 3.
Number of Colonoscopies Required to Increase the Prevalence of Current Screening During a Five-year Period for New Mexico Adults Aged 50 to 85 Years
| Screening increase over five years (%) | Annual number of colonoscopies (based on detection rates from VA study)a | Annual number of colonoscopies (based on detection rates from sensitivity analysis)b |
|---|---|---|
| 5 | 5568 (5983)c | 5137 (5360) |
| 10 | 11,136 (11,966) | 10,274 (10,721) |
| 15 | 16,704 (17,949) | 15,411 (16,082) |
| 20 | 22,272 (23,932) | 20,548 (21,442) |
| 25 | 27,840 (29,915) | 25,568 (26,800) |
Includes numbers of screening tests based on 2000 New Mexico census data and numbers of surveillance tests based on applying cancer (1.0%) and adenomatous polyp (37%) detection rates from a Department of Veterans Affairs (VA) study (28).
Includes numbers of screening tests based on 2000 New Mexico census data and numbers of surveillance tests based on applying cancer (0.5%) and adenomatous polyp (20%) detection rates from sensitivity analysis.
Numbers in parentheses reflect the strategy of performing a three-year surveillance colonoscopy on all patients with adenomatous polyps compared to five-year surveillance interval.