. 2021 Dec;10(12):3211–3221. doi: 10.21037/gs-21-608

Table 4. C-index of RCB class and Miller‐Payne system for DFS and DSS.

Subtype	Staging system	C-index for DFS	P	C-index for DSS	P
Whole cohort	RCB	0.73	<0.0001	0.74	0.0003
Whole cohort	Miller-Payne	0.64	<0.0001	0.64	0.0003
Luminal	RCB	0.64	0.001	0.72	0.021
Luminal	Miller-Payne	0.53	0.001	0.57	0.021
HER2+	RCB	0.66	0.108	0.56	0.405
HER2+	Miller-Payne	0.62	0.108	0.52	0.405
TNBC	RCB	0.83	0.002	0.84	0.0006
TNBC	Miller-Payne	0.72	0.002	0.72	0.0006

C-index, concordance-index; RCB, residual cancer burden; DFS, disease-free survival; DSS, disease-specific survival; HER2, human epidermal growth factor receptor 2; TNBC, triple negative breast cancer.