Correlation between Ferroptosis-Related Gene Signature and Immune Landscape, Prognosis in Breast Cancer

Table 1

Clinical characteristics of the BC patients used in this study.

Characteristic	TCGA [] (total)	TCGA [] (training set)	TCGA [] (internal validation set)	GSE21653 [] (external validation set)
Age (years)
≤65	498	306	192	186
>65	198	114	84	62
Tumor stage
T1-T2	589	358	231	178
T3-T4	107	62	45	63
Lymph node metastasis
Yes	355	209	146	116
No	366	209	127	130
Unknown	5	2	3
TNM stage
I-II	524	326	198	NA
III-IV	172	94	78	NA
Distant metastasis
Yes	9	6	3	NA
No	598	362	236	NA
Unknown	89	52	37	NA
Estrogen receptor status
Negative	159	325	212	107
Positive	537	95	64	139
Progesterone receptor status
Negative	232	278	186	122
Positive	464	142	90	124
Her-2 overexpression
Negative	539	319	220	NA
Positive	157	101	56	NA
Triple negative
Yes	112	70	42	72
No	584	350	234	176
OS status
Survival	619	374	245	NA
Censored	77	46	31	NA
DFS status
Disease-free	603	361	242	169
Disease	93	59	34	79