Table 1. Correlation of clinicopathological features of breast cancer with HRD1 expression levels.

Characteristics	All cases	HRD1 expression levels
		High expression	Low expression	P value
Age				0.552
<50	86	32	54
≥50	84	35	49
Tumor size (cm)				0.225
<2	74	33	41
≥2	96	34	62
Grade				0.023*
I, well-differentiated	23	14	9
II, moderately differentiated	99	40	59
III, poorly differentiated	48	13	35
Tumor histological				0.064
Ductal carcinoma in situ	23	14	9
Invasive ductal carcinoma	130	48	82
Invasive lobular carcinoma	17	5	12
ER status				0.989
Negative	61	24	37
Positive	109	43	66
PR status				0.557
Negative	79	33	46
Positive	91	34	57
HER2/neu status				0.776
Negative	112	45	67
Positive	58	22	36
IGF-1R status				0.000*
Negative	57	36	21
Positive	113	31	82
Lymph node-metastasis				0.000*
Negative	90	57	33
Positive	80	10	70
Nuclear p65 expression
High expression	60	37	23	0.000*
Low expression	110	30	80