Table 4.

Comparisons of actionable genes between HER2-0 and HER2-low tumors.

Subtype	Gene	Mean	SD	Min	Max
HER2-0 (246) *	AKT2	0.012	0.110	0	1
	BRCA1	0.049	0.358	0	5
	BRCA2	0.098	0.412	0	4
	ERBB2	0.280	0.459	0	2
	ERBB3	0.004	0.064	0	1
	ESR1	0.008	0.128	0	2
	PIK3CA	0.358	0.544	0	2
	PTEN	0.008	0.128	0	2
	MDM2	0.037	0.188	0	1
HER2-low (369) *	AKT2	0.014	0.116	0	1
	BRCA1	0.073	0.649	0	9
	BRCA2	0.171	1.154	0	14
	ERBB2	0.317	0.494	0	3
	ERBB3	0.003	0.052	0	1
	ESR1	0.008	0.090	0	1
	PIK3CA	0.493	0.595	0	3
	PTEN	0.008	0.090	0	1
	MDM2	0.038	0.191	0	1

* Subtype(subject number); HER2-0 and HER2-low are defined in the Section 4.