Table 4a.

Co-expression of HER2 and ER

		ER Expression		Positive Rate (%)	X2	OR (95%CI)	P-value
Cases	HER2 Expression	(-)	(+)		7.566	4.156 (1.459-11.839)	0.006*
22	(-)	14	8	36.4
54	(+)	16	38	70.4