Table 7

Benign lesions and epithelial proliferation assessment by all participants (excluding educational cases)

(a) No of cases and κ values for classification of benign lesions*
FibroadenomaFibrocystic changePapillomaSclerosing lesionAdenosisTotal no of cases
κNo of casesκNo of casesκNo of casesκNo of casesκNo of cases
19 902–19 9510.8470.2440.3010.73110.43336
19 952–20 0010.7450.3850.4630.6460.39323
20 002–20 0510.4820.3770.8280.4940.39325
20 052–20 1010.6690.50180.84130.4730.57651
20 102–20 1410.5270.4970.7860.5230.34137
19 902–20 1410.64300.44410.78310.60270.4616172
(b) No of cases and κ values for cases assessed for classification of epithelial proliferation†
Present
Not presentWithout atypiaWith atypiaOverall
CirculationNo of casesκNo of casesκNo of casesκNo of casesκ
19 902–19 951200.40160.2240.21400.29
19 952–20 00170.41140.2230.22240.29
20 002–20 05190.38140.1940.21270.26
20 052–20 101210.41300.2410.14520.29
20 102–20 141180.35190.2130.19400.26
19 902–20 141750.39930.22150.191830.28
  • *Readers can enter more than one diagnosis for benign lesions. κ values were calculated by taking each component in turn and calculating the kappa for that being present or not present; consequently, it is not possible to calculate an overall kappa value. There were not enough cases to include solitary cyst and periductal mastitis/duct ectasia. The ‘no of cases’ column gives the number of cases where the component was present.

  • †Cases where the overall diagnosis was benign or atypia.