Fig. 1.

Ability of pathologists to determine treatment status

a Mean discriminative ability of 18 pathologists to determine treatment status. The mean sensitivity, which is reflected by the percentage of true-positive assessments in the cohort of treated patients, was 76.2 per cent. The mean specificity, which is reflected by the percentage of true-negative assessments in the cohort of untreated patients, was 49.0 per cent. b Proportion of correctly and incorrectly scored patients for whom assessment was labelled as ‘easy/certain’ and ‘difficult/uncertain’. Some 59.8 per cent of correctly scored assessments, and 47.7 per cent of incorrectly scored ones, were labelled as ‘easy/certain’.