Test characteristics of virtual colonoscopy (VC) and conventional colonoscopy (CC) in detecting colorectal neoplasia*
| Test | Lesion size | Sensitivity (95% CI) | Specificity (CI) | +LR | −LR |
|---|---|---|---|---|---|
| *Diagnostic terms defined in glossary; LRs calculated from data in article. | |||||
| VC | 1–5 mm | 14% (10 to 18) | 91% (87 to 94) | 1.42 | 0.96 |
| ⩾6 mm | 39% (30 to 48) | 91% (88 to 93) | 4.11 | 0.67 | |
| 6–9 mm | 30% (20 to 40) | 93% (91 to 95) | 4.35 | 0.75 | |
| ⩾10 mm | 55% (40 to 70) | 96% (94 to 98) | 13.75 | 0.47 | |
| CC | 1–5 mm | 97% (95 to 99) | 100% | ∞ | 0.03 |
| ⩾6 mm | 99% (97 to > 99.9) | 100% | ∞ | 0.01 | |
| 6–9 mm | 99% (96 to > 99.9) | 100% | ∞ | 0.01 | |
| ⩾10 mm | 100% | 100% | ∞ | 0.0 | |