Table I.
Performance factors of the ME-NBI diagnostic algorithm in predicting gastric cancer.
| Factors | Observer A (%) | Observer B (%) | Observer C (%) | Observer D (%) | Observer E (%) | Mean (%) |
|---|---|---|---|---|---|---|
| Sensitivity | 88.0 | 88.5 | 85.0 | 81.0 | 91.0 | 86.7 |
| Specificity | 70.0 | 25.0 | 50.0 | 55.0 | 40.0 | 48.0 |
| PPV | 96.7 | 92.2 | 94.5 | 94.8 | 93.9 | 94.4 |
| NPV | 37.0 | 17.7 | 25.3 | 22.7 | 31.0 | 26.7 |
| Accuracy | 86.4 | 82.7 | 81.8 | 78.7 | 86.4 | 83.2 |
ME-NBI, magnifying endoscopy with narrow-band imaging; PPV, positive predictive value; NPV, negative predictive value. The values of sensitivity, specificity, PPV, NPV, and accuracy, i.e., the first and second reading/2.