Table 4.
Comparison of diagnostic performance of the three procedures for lesions < 10 mm and > 10 mm (%)
| Conventional examination | NBI | Lugol’s solution | ||||
| <10 mm | >10 mm | <10 mm | >10 mm | <10 mm | >10 mm | |
| Sensitivity (95% CI) | 0 (0-0) | 85.7 (59.8-100) | 100 (100-100) | 100 (100-100) | 100 (100-100) | 100 (100-100) |
| Specificity (95% CI) | 100 (100-100) | 100 (100-100) | 90 (84.6-95.4) | 96.7 (93.5-100) | 75.8 (68.2-83.5) | 96.7 (93.5-100) |
| PPV (95% CI) | n/c | 100 (100-100) | 14.3 (4.0-32.6) | 63.6 (35.2-92.1) | 6.5 (2.2-15.1) | 63.6 (35.2-92.1) |
| NPV (95% CI) | 98.4 (96.1-100) | 99.20 (97.6-100) | 100 (100-100) | 100 (100-100) | 100 (100-100) | 100 (100-100) |
| Accuracy (95% CI) | 98.4 (96.1- 100) | 99.2 (97.6-100) | 90.2 (84.9-95.4) | 96.9 (93.8-100) | 76.2 (68.7-83.8) | 96.9 (93.8-99.9) |
| PLR | n/c | n/c | 10 | 30 | 4.1 | 30 |
| NLR | 1 | 0.1 | 0 | 0 | 0 | 0 |
n/c: Not calculable; NBI: Narrow-band imaging; PPV: Positive predictive value; NPV: Negative predictive value; PLR: Positive likelihood ratio; NLR: Negative likelihood ratio.