Table 2. Treatment arm and tumour characteristics by HER2 status.

	HER2=0 (n=542)		HER2=1 + (n=39)		HER2=2 + (n=47)		HER2=3 + (n=103)
	No.	%	No.	%	No.	%	No.	%
Treatment arm
FEC14	277	51.1	19	48.7	24	51.1	50	48.5
FEC21	265	48.9	20	51.3	23	48.9	53	51.5
Tumour size
pT1	261	48.2	15	38.5	25	53.2	43	41.7
pT2	246	45.4	19	48.7	17	36.2	56	54.4
pT3–4	30	5.5	3	7.7	4	8.6	2	2.0
Unknown	5	0.9	2	5.1	1	2.1	2	1.9
Nodal status
Negative	206	38.0	16	41.0	13	27.7	40	38.8
Positive	336	62.0	23	59.0	34	72.3	63	61.2
Grading
G1	38	7.0	2	5.1	3	6.4	1	1.0
G2	285	52.6	21	53.8	22	46.8	46	44.7
G3	161	29.7	11	28.2	16	34.0	46	44.7
Unknown	58	10.7	5	12.8	6	12.8	10	9.7
ER status
Negative	215	39.7	12	30.8	22	46.8	69	67.0
Positive	316	58.3	26	66.7	22	46.8	28	27.2
Unknown	11	2.0	1	2.6	3	6.4	6	5.8
PgR status
Negative	250	46.1	18	46.2	26	55.3	72	69.9
Positive	254	46.9	14	35.9	16	34.0	20	19.4
Unknown	38	7.0	7	17.9	5	10.6	11	10.7

ER=oestrogen receptor; PgR=progesterone receptor.