Further multivariable analysis demonstrated that in grade 1, 2 breast cancer patients, the Ki-67 expression level was a significant independent factor for RFS in all patients (HR = 1.87, 95% CI: 1.30-2.68, p = 0.001) and those with luminal-like breast cancer (HR = 1.92, 95% CI: 1.22-3.03, p = 0.005) and TNBC (HR = 31, 95% CI: 3.33-288.63, p = 0.003). Here, MKI67 is linked to breast cancer.