Table 2.

Downgraded lesions by the DTL model and histopathology results in the validation set

R	N1				N2				Histologically benign				Histologically malignant
	4 A	4B	4 C		4 A	4B	4 C		4 A	4B	4 C		4 A	4B	4 C
R1	29	22	19		27	19	16	DTL benign	26	18	14		1	1	2
								DTL malignant	1	1	0		1	2	3
R2	32	20	22		29	16	17	DTL benign	28	15	15		1	1	2
								DTL malignant	1	0	1		2	4	4
R3	29	19	20		26	17	16	DTL benign	25	15	14		1	2	2
								DTL malignant	1	0	1		2	2	3
R4	31	24	21		27	21	17	DTL benign	26	19	14		1	2	3
								DTL malignant	1	0	0		3	3	4
R5	30	20	24		28	16	19	DTL benign	27	14	16		1	2	3
								DTL malignant	0	0	1		2	4	4
Total	151	105	106		137	89	85		136	82	76		15	23	30

Note: R, resident; N1, number of BI-RADS 4 lesions diagnosed by residents; N2, number of downgraded lesions according to the DTL model