(b).

Method	Timepoints	ACC	SEN	SPE	AUC
SVM	1st visit	70.0	76.3	59.8	0.745
	1st + 2nd visit	74.0	81.4	62.3	0.767
PCA	1st visit	74.5	77.2	65.9	0.772
	1st + 2nd visit	74.0	79.7	66.0	0.778
RBF	1st visit	76.5	79.1	67.4	0.791
	1st + 2nd visit	81.7	86.5	70.3	0.866
RF	1st visit	82.4	85.2	76.9	0.874
	1st + 2nd visit	82.4	85.3	76.9	0.876