Clinical characteristics of the samples at diagnosis.

*p denotes results of significant test for the comparison between ER+ versus ER− breast cancer by chi-square test.RNA-seq, RNA-sequencing; PR, Progesterone Receptor; NA, Not Available; HER2, Human Epidermal Growth Factor Receptor 2.

注：p值代表通过卡方检验（chi-square test）对比雌激素受体阳性（ER+）与雌激素受体阴性（ER−）乳腺癌的显著性检验结果。RNA-seq即RNA测序（RNA-sequencing）；PR为孕激素受体（Progesterone Receptor）；NA表示无可用数据（Not Available）；HER2为人表皮生长因子受体2（Human Epidermal Growth Factor Receptor 2）。