Table 3.

Comparison of the gHC threshold, Pontecorvo threshold and ROC optimised threshold.

	n	gHC threshold					Pontecorvo threshold					ROC optimised threshold
		mcSUVR	TPR	FPR	Acc	MCC	mcSUVR	TPR	FPR	Acc	MCC	mcSUVR	TPR	FPR	Acc	MCC
All	100	1.17	96%	24%	85%	0.72	1.11	98%	33%	81%	0.67	1.32	87%	15%	86%	0.72
Type A	79		97%	12%	92%	0.85		97%	22%	87%	0.76	1.18	97%	12%	92%	0.85
Non-A	21		88%	62%	57%	0.23		100%	69%	57%	0.38	1.48	38%	0%	76%	0.52
Type B	15		100%	43%	80%	0.64		100%	43%	80%	0.64	-	-	-	-	-
Type C	6		N/A	100%	0%	-1		N/A	100%	0%	-1	-	-	-	-	-

Acc, accuracy; FPR, false positive rate; MCC, Matthews correlation coefficient; ROC, receiver operating characteristic; TPR, true positive rate; mcSUVR, mean cortical standardised uptake value.