Table 3.

The variable assignment of cox model.

Variable	Variable assignment
Outcome	0 = control; 1 = metastasis
ER	0 = negative; 1 = positive
HER2	0 = negative; 1 = positive
E-Cad	0 = negative; 1 = positive
Ki67	1 = ‘< 20’; 2 = ‘ ≥ 20’
Molecular subtypes	1 = Luminal A; 2 = Luminal B; 3 = Luminal HER2; 4 = HER2-enriched; 5 = Basal-like
Lymph node metastasis	0 = ‘0’; 1 = ‘1 ~ 3’; 2 = ‘4 ~ 9’; 3 = ‘ ≥ 10’