Challenges in the real world use of classification accuracy metrics: From recall and precision to the Matthews correlation coefficient
Fig 8
Relationship between apparent LR+ and LR- values with prevalence assessed using three imperfect reference standards.
(a) Error in the reference is independent of that in the classification and (b) error in the reference is correlated with that in the classification. Note, in Fig 2B the Y axis for the positive LR was trimmed for visualisation purposes, the apparent value obtained for LR+ rises to 909.2. The true relationship, obtained using a gold standard reference, is also shown for comparative purposes with a dashed black line.