Table 2.

Correlation coefficient of biomarkers and EZH2 scores

	EZH2	r	P-value
Primary ER status	Primary	−0.103	0.318
Primary PR status	Primary	−0.111	0.282
Primary HER2 status	Primary	0.361	<0.001*
Primary Ki-67 expression	Primary	0.722	<0.0001*
Metastatic ER status	Metastatic	−0.099	0.339
Metastatic PR status	Metastatic	−0.190	0.064
Metastatic HER2 status	Metastatic	0.306	0.002*
Metastatic Ki-67 expression	Metastatic	0.685	<0.0001*

Abbreviations: ER estrogen receptor, EZH2 enhancer of zeste homolog 2, HER2 human epidermal growth factor receptor 2, PR progesterone receptor

^*Indicates values that are statistically significant (P < 0.01)