Table 1. Demographic and clinical-pathological characteristics of patients in the study cohort.

Parameter	Status	Total cohort		Basal subset
		Cases	%	Cases	%
Age at diagnosis	≤35 years	13	3	7	10
	>35years	430	97	62	90
Tumor sizea	T1a/b	2	<1	1	<1
	T1c	69	16	7	10
	T2	277	63	40	58
	T3	66	15	15	22
	Unknown	29	7	6	9
Nodal status	Positive	190	43	33	48
	Negative	228	51	26	38
	Unknown	25	6	10	14
Tumor grade	1	71	16	4	5
	2	267	60	19	28
	3	103	23	46	67
	Unknown	2	<1	0	0
ERb	Positive	203	46	0	0
	Negative	240	54	69	100
	Unknown	0	0	0	0
PRb	Positive	228	51	0	0
	Negative	215	49	69	100
	Unknown	0	0	0	0
Molecular subtypes	Luminal A	193	44
	Luminal B	48	11
	Her2	67	15
	TNNBc	35	8
	Basal-like	69	15
	Unclassified	32	7

^aTumor size: 0.1cm<T1a/b<1cm; 1cm ≤ T1c<2cm; 2cm≤T2<5cm; 5cm≤T3.

^bER negative defined as <10 fmol/mg protein and PR negative as ≤15 fmol/mg protein (ligand binding assay).

^cTNNB: Triple negative-non-basal.