Texture Analysis of Dynamic Contrast-Enhanced MRI in Evaluating Pathologic Complete Response (pCR) of Mass-Like Breast Cancer after Neoadjuvant Therapy

Table 1

Clinical characteristics of study population.

Characteristics	Training set (N = 112)			Validation set (N = 39)
	All	pCR (N = 40)	Non-pCR (N = 72)	All	pCR (N = 16)	Non-pCR (N = 23)
Age at diagnosis (y)	48.3 ± 9.7	48.8 ± 9.6	48.0 ± 9.7	47.5 ± 8.9	48.1 ± 7.8	47.2 ± 9.7
Histology
IDC	108	39	69	39	16	23
Non-IDC	4	1	3	0	0	0
Tumor grade of IDC
1	4	1	3	0	0	0
2	77	28	49	23	8	15
3	27	10	17	16	8	8
Histopathological status HR
Negative	33	19	14	15	8	7
Positive	79	21	58	24	8	16
HER2
Negative	69	16	53	24	6	18
Positive	43	24	19	15	10	5
Pathologic T stage at surgery
0	26	26	—	12	12	—
In situ	14	14	—	4	4	—
1	58	—	58	18	—	18
2	9	—	9	3	—	3
3	2	—	2	1	—	1
4	3	—	3	1	—	1