TABLE 1. Patient and Tumor Characteristics by HER-2 Status.

	All patients		HER-2 negative		HER-2 positive
	No.		No.		No.
No.	179	Percent	111	Percent	68	Percent	P
Age at diagnosis, y
Minimum	27		29		27
Median	51		51		48.5
Maximum	78		75		78		.3796
Histology
Other	17	10%	12	11%	5	8%
Ductal	155	90%	97	89%	58	92%	.515
Grade
1/2	35	20%	25	23%	10	15%
3	137	80%	82	77%	55	85%	.208
ER status
Negative	111	62%	65	59%	46	68%
Positive	67	38%	45	41%	22	32%	.252
PR status
Negative	124	70%	70	64%	54	79%
Positive	53	30%	39	36%	14	21%	.032
Lymphovascular invasion
Negative	34	22%	23	23%	11	20%
Positive	122	78%	77	77%	45	80%	.626
Lymph node classification
N0	17	10%	11	10%	6	9%
N1–3	159	90%	99	90%	66	91%	.840
Pathologic CR
No	154	87%	97	88%	57	85%
Yes	23	13%	13	12%	10	15%	.551

ER indicates estrogen receptor, PR, progesterone receptor, CR, complete response.