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. 2020 Oct 31;15(2):537–543. doi: 10.1007/s12105-020-01243-y

Table 1.

Summary of diagnoses by pathologists (P1, P2, P3, P4 and P5) and diagnostic concordance rates

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