Table 2  Patientsʼ characteristics.

Characteristic		Mean or n	SD or %
BMI = body mass index; ER = estrogen receptor; PR = progesterone receptor
Age (years)		53.4	10.5
BMI (kg/m 2 )		26.2	5.1
Tumor stage	pT1	705	42.4
	pT2	843	50.7
	pT3	94	5.6
	pT4	22	1.3
Nodal status	pN0	551	33.1
	pN+	1 113	66.9
Tumor type	Ductal	1 363	81.9
	Lobular	191	11.5
	Other	110	6.6
Grading	G1	87	5.2
	G2	823	49.5
	G3	754	45.3
ER	Negative	504	30.3
	Positive	1 160	69.7
PR	Negative	605	36.4
	Positive	1 059	63.6
HER2	Negative	1 264	76.0
	Positive	400	24.0
Triple-negative	No	1 352	91.2
	Yes	312	18.8