. Author manuscript; available in PMC: 2015 Jul 1.

Published in final edited form as: Breast Cancer Res Treat. 2014 May 20;146(1):15–24. doi: 10.1007/s10549-014-2988-5

Table 3.

Association between PD-L1 expression and breast cancer intrinsic subtype

Intrinsic subtype	PD-L1- positive		PD-L1- negative		p- value
	(n)	(%)	(n)	(%)	0.5340
Luminal A	10	12.1	73	87.9
(ER⁺ and/or PR⁺, HER2⁻, Ki- 67 < 14 %)
Luminal B (HER2-negative)	63	20.4	246	79.6
(ER⁺ and/or PR⁺, HER2⁻, Ki- 67 ≥ 14 %)
Luminal B (HER2-positive)	21	28.8	52	71.2
(ER⁺ and/or PR⁺, HER2⁺)
HER2 type (ER⁻, PR⁻, HER2⁺)	19	33.9	37	66.1
Basal-like (ER⁻, PR⁻, HER2⁻)	39	30.7	88	69.3