Table 2.

Median (range) level of HER2 amplifications and pCR as defined by ypT0 N0, ypT0/is N0, ypT0/is.

	ypT0 ypN0			ypT0/is ypN0			ypT0/is
	pCR	Non-pCR	P	pCR	Non-pCR	P	pCR	Non-pCR	P
HER2/CEP17 ratio, mean (range)	7.08 (3.16–10.40)	4.70 (1.06–9.00)	.030	6.87 (2.54–10.40)	3.15 (1.06–5.90)	.029	6.51 (2.54–10.40)	2.11 (1.06–3.15)	.017
Average HER2 copy number, mean (range)	17.00 (5.85–37.50)	12.00 (5.85–20.95)	.174	17.00 (5.85–37.50)	11.30 (2.50–12.00)	.070	16.40 (5.85–37.50)	7.25 (2.50–12.00)	.093