Table 2. Patient Characteristics.

	Affymetrix Dataset	Agilent Dataset	Total
Characteristic	n=1033 (%)	n=386 (%)	n=1419 (%)
Age
<50	461 (49)	116 (52)	577 (49)
>50	488 (51)	108 (48)	596 (51)
Histologic Grade
Grade: 1	60 (7)	29 (8)	89 (7)
Grade: 2	347 (40)	178 (49)	525 (42)
Grade: 3	469 (54)	156 (43)	625 (50)
ER Status
ER pos	508 (49)	218 (58)	726 (52)
ER neg	521 (51)	160 (42)	681 (48)
HER2 Status
HER2 pos	135 (12)	72 (20)	207 (14)
HER2 neg	993 (88)	292 (80)	1285 (86)
Clinical Subtype
ER	465 (49)	183 (48)	648 (49)
HER2	135 (14)	91 (24)	226 (17)
TNBC	340 (36)	106 (28)	446 (34)
PAM50 Subtype
LumA	280 (27)	108 (28)	388 (27)
LumB	197 (19)	82 (21)	279 (20)
Her2	124 (12)	38 (10)	162 (11)
Normal	95 (9)	48 (12)	143 (10)
Basal	337 (33)	110 (28)	447(32)
Anthracycline
Anthracycline: Yes	970 (94)	250 (65)	1220 (86)
Anthracycline: No	63 (6)	134 (35)	197 (14)
Alkylator
Alkylator: Yes	1037 (93)	160 (42)	1197 (80)
Alkylator: No	84 (7)	224 (56)	308 (20)
Taxane
Taxane: Yes	765 (74)	291 (76)	1056 (75)
Taxane: No	268 (26)	93 (24)	361 (25)
Combination Chemotherapy
Anthra + Tax +/- Alk	722 (76)	156 (45)	156 (41)
Anthra +/- Alk	183 (19)	53 (15)	57 (15)
Taxane Only	43 (5)	4 (1)	136 (35)
Anthtra + Plat	0	136 (39)	35 (9)

Abbreviations: Anthra, Anthracycline; Tax, Taxane; Alk, Alkylator; Plat, Platinum.