Baseline assumptions and range tested in the sensitivity analysis
| Baseline model | Sensitivity analysis | |
| Sensitivity in detecting dysplasia and CRC | 90% | 50–100% |
| Specificity of surveillance in detecting dysplasia and CRC | 95% | 80–100% |
| Case fatality rate of CRC in surveillance | 13% | 5–45% |
| Health related quality of life after proctocolectomy | 95% | 85–100% |
| Surveillance interval | 2 y | 1–5 y |
| Time lag between dysplasia and CRC | 3 y | 1–5 y |
| Costs per surveillance colonoscopy | $911 | $200–$1500 |
| Costs of proctocolectomy | $8300 | $4150–$16 600 |
| Costs of terminal care per patient with CRC | $34 100 | $17 050–$68 200 |
| Average annual income | $24 294 | $10 000–$50 000 |
| Annual discount rate | 3% | – |
CRC, colorectal cancer.