Table 1

Univariate and multivariate Cox proportional hazard models for RFS

Variable	Univariate		Multivariate
Variable	HR (95% CI)	p-value	HR (95% CI)	p-value
Age, years	0.997 (0.971 to 1.024)	0.837	Not Included
Positive lymph node, number	1.089 (1.049 to 1.131)	<0.001	1.093 (1.048 to 1.140)	<0.001
Tumor size, cm	1.462 (1.117 to 1.816)	0.001	1.368 (1.085 to 1.724)	0.008
HRD score	0.997 (0.989 to 1.006)	0.525	Not Included
PAM50
Basal	Ref		Not Included
Others	1.375 (0.749 to 2.524)	0.304
Tumor HLA-I LOH
LOH	Ref		Ref
Non-LOH	0.459 (0.245 to 0.860)	0.015	0.307 (0.158 to 0.596)	<0.001
TNBC immune subtype
Immune-inflamed	Ref		Ref
Non-immune-inflamed	2.519 (1.067 to 5.946)	0.035	2.784 (1.169 to 6.629)	0.033

HRs and p-values of the covariates in the univariate and multivariate Cox proportional hazard models for RFS.
CI, confidence interval; HLA, human leukocyte antigen; HRD, homologous recombination deficiency; LOH, loss of heterozygosity; RFS, relapse-free survival; TNBCs, triple-negative breast cancers.