Table 1.
Discrimination metrics of the TzanckNet on the validation dataset that contains 359 Tzanck smear findings.
| Accuracy | Sensitivity | Specificity | PPV | NPV | AUC | F1 score (%) | |
|---|---|---|---|---|---|---|---|
| Acantholytic cell | 315/359 (87.7%) | 118/139 (84.9%) | 197/220 (89.5%) | 118/141 (83.7%) | 197/218 (90.4%) | 0.954 | 84.3 |
| Eosinophil | 324/359 (90.3%) | 24/59 (40.7%) | 300/300 (100%) | 24/24 (100%) | 300/335 (89.6%) | 0.918 | 57.8 |
| Hypha | 352/359 (98.1%) | 39/39 (100%) | 313/320 (97.8%) | 39/46 (84.8%) | 313/313 (100.0%) | 0.999 | 91.8 |
| Multinucleated giant cell | 353/359 (98.3%) | 109/114 (95.6%) | 244/245 (99.6%) | 109/110 (99.1%) | 244/249 (98.0%) | 0.998 | 97.3 |
| Normal keratinocyte | 359/359 (100%) | 47/47 (100%) | 312/312 (100%) | 47/47 (100%) | 312/312 (100%) | 1 | 100% |
| Tadpole cell | 329/359 (91.6%) | 52/67 (77.6%) | 277/292 (94.9%) | 52/67 (77.6%) | 277/292 (94.9%) | 0.959 | 77.6% |
| Overall | 2032/2154 (94.3%) | 389/465 (83.7%) | 1643/1689 (97.3%) | 389/435 (89.4%) | 1643/1719 (95.6%) | 0.974 | 86.4% |
PPV positive predictive value, NPV negative predictive value, AUC area under the receiver operating characteristic curve.