Table 5. Accuracy of the random forest classifier.

	Predicted
	Accurately	Not Accurately
S+/- D++ a	81.1%	18.9%
S+ D+ b	86.3%	14.7%
S+D- c	69.1%	31.9%
S-D- d	79.7%	20.3%

^a discomfort / symptom grade is higher than the grade/severity of signs

^b similar grades of discomfort / symptoms and signs

^c without discomfort / symptoms but present with signs

^d without discomfort / symptoms and no clinical signs