Table 1.
Test characteristics of CT colonography (CTC), MR colonography (MRC), colonoscopy and faecal immunochemical test (FIT)
| Test | Positivity rate per lesion |
||||||
|---|---|---|---|---|---|---|---|
| No adenoma (per person) (%) | Adenoma <6 mm (%) | Adenoma 6–9 mm (%) | Adenoma ≥10 mm (%) | CRC early stage (%) | CRC late stage (%) | References | |
| CTC | 9 | a | 76 | 86 | 96 | 96 | 16, 17 and 33 |
| MRC | 10 | a | 75 | 84 | 100 | 100 | 18–21 |
| Colonoscopy | 0 | 74 | 87 | 97.9 | 100 | 100 | 34 |
| FIT | |||||||
| Males | 4 | a | 12 | 30 | 50 | 85 | 26 and 35 |
| Females | 3 | a | 10 | 28 | 50 | 85 | |
CRC, colorectal cancer.
a
We assumed that the positivity rate in individuals with diminutive adenomas is equal to that in healthy individuals (i.e. individuals with no adenoma).