Table 2.

Clinicopathological characteristics of the specimens used for analysis from cohort 1 and cohort 2. Results for ER, PR, HER2, and KI67 as listed in this table are reported based on immunohistochemistry.

Collection		Cohort 1		Cohort 2
		N	%	N	%
Material type						p = 0.70
	CNB	236	62.4	256	100.0
	RES	142	37.6	0	0.0
Histological type						p = 0.72
	Invasive ductal carcinoma	298	78.8	203	79.3
	Invasive lobular carcinoma	56	14.8	38	14.8
	Other	24	6.3	15	5.9
Histological Grade						p = 0.58
	1	77	20.4	51	19.9
	2	220	58.2	145	56.6
	3	65	17.2	55	21.5
	Unknown	16	4.3	5	2.0
ER Status						p = 0.70
	Positive	311	82.3	190	74.2
	Negative	67	17.7	66	25.8
PR Status						p = 0.60
	Positive	281	74.3	163	63.7
	Negative	97	25.7	93	36.3
Ki67 (20% cut-off)						p = 0.62
	High	172	45.5	121	47.3
	Low	205	54.2	134	52.3
	Unknown	1	0.3	1	0.4
HER2 Status						p = 0.76
	Positive	36	9.5	32	12.5
	Negative	342	90.5	204	79.7
	Unresolved	0	0.00	20	7.8