Table 2.
Diagnostic performance of the computer-assisted diagnosis system in the testing dataset
|
Per-patient analysis
|
Per-image analysis
|
|||||||
|
Overall (%)
|
WLI (%)
|
NBI (%)
|
P
value
|
Overall (%)
|
WLI (%)
|
NBI (%)
|
P
value
|
|
| Accuracy (95%CI) | 92.9 (89.5-95.2) | 89.2 (85.3-92.1) | 94.7 (91.7-96.7) | < 0.001 | 87.5 (85.9-89.0) | 85.9 (83.3-88.1) | 89.0 (86.8-90.9) | 0.156 |
| Sensitivity (95%CI) | 91.9 (87.4-94.9) | 88.0 (82.9-91.8) | 94.3 (90.2-96.7) | < 0.001 | 86.6 (84.7-88.3) | 84.1 (80.8-86.8) | 88.4 (86.0-90.4) | 0.067 |
| Specificity (95%CI) | 94.7 (89.0-97.6) | 91.2 (84.6-95.2) | 95.6 (90.1-98.1) | 0.015 | 91.7 (88.2-94.3) | 90.9 (86.2-94.1) | 93.4 (87.0-96.8) | 0.750 |
| PPV (95%CI) | 97.0 (93.5-98.6) | 94.8 (90.8-97.2) | 97.7 (94.3-98.9) | 0.316 | 97.9 (96.9-98.5) | 96.2 (94.2-97.6) | 99.0 (98.0-99.5) | 0.004 |
| NPV (95%CI) | 86.4 (79.3-91.3) | 80.6 (73.0-86.5) | 90.1 (83.5-94.2) | 0.099 | 61.1 (56.6-65.4) | 67.4 (61.7-72.6) | 51.8 (44.8-58.8) | 0.003 |
WLI: White-light imaging; NBI: Narrow-band imaging; PPV: Positive predictive value; NPV: Negative predictive value.