Table 1.

Patient information.

Characteristics		Count
Age at diagnosis	≤50 years	58
	>50 years	72
Menopausal status at diagnosis	pre-menopausal	50
	post-menopausal	62
	unknown	18
Grade	good/moderate	21
	poor	69
	unknown	40
pT; pathological tumor classification	≤2 cm	43
	>2 cm and ≤5 cm	71
	>5 cm + pT4	11
	unknown	5
Nodal status	no positive lymph nodes	75
	positive lymph nodes	55
Age at 1st line therapy	≤50 years	41
	>50 years	89
Menopausal status at start 1st line therapy	pre-menopausal	49
	post-menopausal	81
ERBB2 RT-qPCR status [7]	not amplified	104
	amplified	16
	unknown	10
PIK3CA mutation status	wildtype	27
	mutated	27
	unknown	76
PR protein status	negative	25
	positive	96
	unknown	9
Disease free interval	<1 year	19
	1–3 years	57
	>3 years	54
Adjuvant therapy	none	106
	chemotherapy	24
Dominant site of 1st relapse	Local regional relapse (LRR)	17
	Bone	68
	Other	45