Table 3

	ER (-\+)	PR (-\+)	HER2 (-\+)	Ki67* (-\+)	Tumor Size ≤2 cm\ >2 cm
Caucasian American	222\967	392\806	942\164	257\447	768\394
African American	87/152	119\120	186\30	46\145	129\98
p(χ²)	p(χ²)<0.001	p(χ²)<0.001	p(χ²)<0.7	p(χ²)<0.001	p(χ²)<0.25

*test for ER, PR, HER2 and Ki67 were not run on all tumour samples

Table 3: Cross-tabulation analysis of tumour pathology and patient characteristics stratified by ethnicity.