230 Chapter 15 Table 8. Viewing time (mean ± standard deviation, range [minutes]) is shown for haematoxylin- eosin (H&E), Cytokeratin 7 (CK7) and elastin staining in the three successive rounds. Viewing time was calculated for 41 pathologists (excluding ET). Round Staining 1 2 3 H&E 3.9 ± 4.0 (1.5-22.8) 3.5 ± 2.2 (1.1-11.8) 2.0 ± 2.1 (0.4-12.5) CK7 1.5 ± 0.5 (0.6-3.0) 2.7 ± 3.6 (0.3-24.1) 0.8 ± 0.6 (0.2-3.0) Elastin 1.2 ± 1.2 (0.3-9.6) 2.4 ± 3.2 (0.2-22.7) 1.5 ± 2.4 (0.1-14.3) To examine the performance of the pathologist’s perspective with respect to the peers (the 41 other pathologists) a ‘consensus percentage’ was determined by calculating the fraction of cases where the score of the individual pathologist was in agreement with the highest consensus score for each case was calculated and shown in Figure 10. Note the left skewed distribution in the first round, which diminished progressively in 2nd and 3rd round. Ideally, all pathologists reach the 100% consensus percentage. As after the third round there is still improvement possible; more education with the proposal for the revised classification may be beneficial. Figure 10. The distribution of ‘consensus percentage’, determined by calculating the fraction of cases where the score of the individual pathologist was in agreement with the highest consensus score for each case, is shown for round 1, 2 and 3, respectively. Note the left skewed distribution in the first round which diminished progressively in 2nd and 3rd round. Ideally, all pathologists reach the 100% consensus percentage.
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