Table 4. Number of false negative (FN) and false positive (FP) margins (stratified by margin histology and surgical margin status) and patients (stratified by MBD) calculated from the surgeon performance, as well as, the performance of the device.

		# of FN (%)		# of FP (%)
		Surgeon	Device	Surgeon	Device
Margin Histology	IDC	3 (19)%	3 (25%)	0 (0%)	0 (0%)
	DCIS	6 (38%)	4 (33%)	0 (0%)	0 (0%)
	IDC/DCIS	1 (6%)	1 (8%)	0 (0%)	0 (0%)
	Other	6 (38%)	4 (33%)	0 (0%)	0 (0%)
	No Tumor	0 (0%)	0 (0%)	33 (100%)	6 (100%)
Surgical Margin Status	Negative	0 (0%)	0 (0%)	33 (100%)	6 (100%)
	Close	10 (63%)	9 (75%)	0 (0%)	0 (0%)
	Positive	6 (38%)	3 (25%)	0 (0%)	0 (0%)
MBD	1	2 (13%)	3 (25%)	4 (18%)	1 (20%)
	2	5 (31%)	5 (42%)	9 (41%)	1 (20%)
	3	8 (50%)	3 (25%)	7 (32%)	2 (40%)
	4	1 (6%)	1 (8%)	2 (9%)	1 (20%)
Measured Margin	Anterior and Posterior	13 (81%)	9 (75%)	10 (30%)	4 (67%)
	All Others	3 (19%)	3 (25%)	23 (70%)	2 (33%)