Table 1. Summary of statistical results.
| Phase 1 (n = 20) | Phase 2 (n = 43) | ||||||
| Real result | Σ | Real result | Σ | ||||
| Benign | Malignant | Benign | Malignant | ||||
| FNAC + | 0 | 5 | 5 | FNAC + | 0 | 32 | 32 |
| FNAC- | 7 | 8 | 15 | FNAC- | 8 | 3 | 11 |
| Σ | 7 | 13 | 20 | Σ | 8 | 35 | 43 |
| Sens. | 38.5 % (13.9 – 68.4 %) | Sens. | 91.4 % (76.9 – 98.2 %) | ||||
| Spec. | 100 % (59.0 – 100 %) | Spec. | 100 % (63.1 – 100 %) | ||||
| PPV | 100 % (47.8 – 100 %) | PPV | 100 % (89.1 – 100 %) | ||||
| NPV | 46.7 % (21.3 – 73.4 %) | NPV | 72.7 % (39.0 – 94.0 %) | ||||
Abbreviations: FNAC-, fine-needle aspiration cytology benign; FNAC + , fine-needle aspiration cytology malignant; NPV, negative predictive value; PPV, positive predictive value; Sens., sensitivity; Spec., specificity.95 % confidence interval.