Table 1.
Diagnoses | GT | P1 | P2 | P3 | P4 | P5 | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
Optical | Digital | Optical | Digital | Optical | Digital | Optical | Digital | Optical | Digital | ||
FA/AD | 10 | 10 | 11 | 8 | 11 | 20 | 18 | 8 | 11 | 9 | 12 |
LT | 9 | 9 | 9 | 8 | 9 | 6 | 8 | 5 | 8 | 7 | 9 |
NIFTP | 3 | 3 | 4 | 6 | 4 | 1 | 3 | 3 | 1 | 0 | 0 |
PTC | 23 | 23 | 21 | 22 | 22 | 17 | 17 | 30 | 27 | 34 | 29 |
FTC | 5 | 5 | 5 | 6 | 4 | 5 | 3 | 2 | 2 | 0 | 0 |
Others | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 1 | 0 | 0 |
Concordance with the GT (k statistics) | – | 100% (1.00) | 96% (0.94) | 92% (0.89) | 90% (0.86) | 74% (0.64) | 82% (0.76) | 82% (NC) | 82% (0.73) | 68% (NC) | 76% (NC) |
Intraobserver concordance (k statistics) | – | 96% (0.95) | 86% (0.81) | 80% (0.72) | 84% (0.75) | 88% (0.78) |
FA/AD follicular adenoma/adenomatous nodule, LT nodular transformation of lymphocytic thyroiditis, NIFTP non-invasive follicular tumour with papillary like nuclear features, PTC papillary thyroid carcinoma, FTC follicular thyroid carcinoma, GT ground truth, NC not calculated