Table 3. Confusion matrix for binary classification.

During the calculation of the metrics, the actual and estimated true/false numbers are determined using the confusion matrix.

	Predicted:Mild	Predicted:Moderate	Predicted:Severe	Predicted:Healthy
Actual:Mild	TP	FN	FN	FN
Actual:Moderate	FP	TP	FN	FN
Actual:Severe	FP	FP	TP	FN
Actual:Healthy	FP	FP	FP	TP