Table 1.

Baseline Characteristics of Breast Cancer Patients in TCGA and GEO Datasets

	TCGA-BRCA	GSE20685	GSE20711	GSE42568	GSE58812	GSE88770
No. of patients	1109	327	88	104	107	117
Platform	Illumina RNAseq	Affymetrix U133 Plus 2.0 Array	Affymetrix U133 Plus 2.0 Array	Affymetrix U133 Plus 2.0 Array	Affymetrix U133 Plus 2.0 Array	Affymetrix U133 Plus 2.0 Array
Age
≤65	775 (70.7%)	305 (93.3%)	NA	68 (65.4%)	72 (67.3%)	NA
>65	321 (29.3%)	22 (6.7%)	NA	36 (34.6%)	35 (32.7%)	NA
Gender
Male	12 (1.1%)	0 (0%)	NA	NA	NA	0 (0%)
Female	1084 (98.9%)	327 (100%)	NA	NA	NA	117 (100%)
Stage
I	183 (17.1%)	NA	NA	NA	NA	NA
II	621 (57.9%)	NA	NA	NA	NA	NA
III	248 (23.1%)	NA	NA	NA	NA	NA
IV	20 (1.9%)	NA	NA	NA	NA	NA
Unknown	24 (2.2%)	NA	NA	NA	NA	NA
ER status
Positive	789 (77.4%)	NA	42 (48.3%)	67 (66.3%)	0 (0%)	106 (90.6%)
Negative	231 (22.6%)	NA	45 (51.7%)	34 (33.7%)	107 (100%)	11 (9.4%)
Unknown	78 (7.1%)	NA	1 (1.1%)	3 (2.9%)	NA	NA
PR status
Positive	685 (67.4%)	NA	NA	NA	0 (0%)	79 (68.1%)
Negative	332 (32.6%)	NA	NA	NA	107 (100%)	37 (31.9%)
Unknown	81 (7.4%)	NA	NA	NA	NA	1 (0.9%)
HER-2 status
Positive	162 (15.8%)	NA	26 (29.5%)	NA	0 (0%)	7 (6.1%)
Negative	865 (84.2%)	NA	62 (70.5%)	NA	107 (100%)	108 (93.9%)
Unknown	71 (6.5%)	NA	NA	NA	NA	2 (1.7%)
Subtype
Luminal A	305 (28.6%)	NA	13 (14.8%)	NA	0 (0%)	NA
Luminal B	253 (23.7%)	NA	22 (25.0%)	NA	0 (0%)	NA
HER-2	145 (13.6%)	NA	26 (29.5%)	NA	0 (0%)	NA
Basal	228 (21.4%)	NA	27 (30.7%)	NA	107 (100%)	NA
Normal	136 (12.7%)	NA	0 (0%)	NA	0 (0%)	NA
Unknown	31 (2.8%)	NA	NA	NA	NA	NA
Survival status
Alive	947 (86.4%)	244 (74.6%)	63 (71.6%)	69 (66.3%)	78 (72.9%)	89 (76.1%)
Deceased	149 (13.6%)	83 (25.4%)	25 (28.4%)	35 (33.7%)	29 (27.1%)	28 (23.9%)