Performance of different endoscopic observational modalities in the diagnosis of 180 colorectal lesions (133 patients)
| True-positive findings | True-negative findings | False-positive findings | False-negative findings | Sensitivity (%) | Specificity (%) | Accuracy (%) | Positive predictivevalue (%) | Negative predictivevalue (%) | Likelihood ratio | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Endoscopic Modality | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 | Reader 1 | Reader 2 |
| Conventional colonoscopy | 82 | 92 | 41 | 29 | 7 | 10 | 50 | 49 | 62.1 | 65.2 | 85.4 | 74.4 | 68.3 | 67.2 | 92.1 | 90.2 | 45.1 | 37.2 | 4.26 | 2.54 |
| NBI-L | 116 | 122 | 24 | 23 | 5 | 16 | 25 | 19 | 82.3 | 86.5 | 82.7 | 59.0 | 82.4 | 80.6 | 95.9 | 88.4 | 49.0 | 54.8 | 4.77 | 2.11 |
| NBI-H | 120 | 134 | 37 | 28 | 5 | 11 | 18 | 7 | 87.0 | 95.0 | 88.1 | 71.8 | 87.2 | 90.0 | 96.0 | 92.4 | 67.3 | 80.0 | 7.30 | 3.37 |
| Chromoendoscopy-L | 120 | 111 | 33 | 31 | 6 | 8 | 21 | 30 | 85.1 | 78.7 | 84.6 | 79.5 | 85.0 | 78.9 | 95.2 | 93.3 | 61.1 | 50.8 | 5.53 | 3.84 |
| Chromoendoscopy-H | 126 | 137 | 38 | 29 | 4 | 10 | 12 | 4 | 91.3 | 97.2 | 90.5 | 74.4 | 91.1 | 92.2 | 96.9 | 93.2 | 76.0 | 87.9 | 9.59 | 3.79 |