Table 3.

Performance for UM and Canadian data of ROI artifacts.

	Feature #	Accuracy	Specificity	Sensitivity	F1 score
UM	4 features	0.70	0.66	0.74	0.73
	5–7 features	0.77	0.83	0.71	0.77
Canada	5 features	0.79	0.80	0.77	0.69
	7 features	0.82	0.88	0.70	0.71