Table 3. FDS and pathological diagnoses of non-elevated lesions.
| FDS diagnosis | Result | Pathological diagnosis | Total | Sensitivity | Specificity | Positive predictive rate | Kappa concordance index | P | |
|---|---|---|---|---|---|---|---|---|---|
| Positive | Negative | ||||||||
| Duct dilation (type I) | Positive | 376 | 4 | 380 | 99.21% | 99.20% | 98.95% | 0.984 | <0.001 |
| Negative | 3 | 497 | 500 | ||||||
| Total | 379 | 501 | 880 | ||||||
| Duct inflammation (type II) | Positive | 348 | 2 | 350 | 99.15% | 99.62% | 99.43% | 0.988 | <0.001 |
| Negative | 3 | 527 | 530 | ||||||
| Total | 351 | 529 | 880 | ||||||
| Duct dilatation and inflammation (type III) | Positive | 133 | 3 | 136 | 97.79% | 99.60% | 97.79% | 0.974 | <0.001 |
| Negative | 3 | 741 | 744 | ||||||
| Total | 136 | 744 | 880 | ||||||
| Intraductal carcinoma (type IV) | Positive | 13 | 1 | 14 | 92.86% | 99.88% | 92.86% | 0.927 | <0.001 |
| Negative | 1 | 865 | 866 | ||||||
| Total | 14 | 866 | 880 | ||||||
FDS, fiberoductoscopy.