Table 1.

Description of Sample Sets

Sample Set	Subject No.	Discovery	Validation
Set 1*	67	ER, PR
Set 2	55	HER2	ER, PR†
Set 3	291		ER, PR, HER2‡

^*HER2 IHC status was not available.

^†ER and PR IHC Allred scores were available for 42 of 55 samples.

^‡ER, PR, and HER2 IHC Allred scores were available for 291, 279, and 272 of 291 samples, respectively. A total of 400, 388, and 327 samples with ER, PR, and HER2 IHC status, respectively, were used for data analyses.