Additional file 3 of Clinical features and survival of pregnancy-associated breast cancer: a retrospective study of 203 cases in China

Additional file 3: Table S1. Patient characteristics and tumor characteristics according to pregnancy (abortion), pregnancy (non-abortion) and lactation subgroup. (a): HR positive: ER (estrogen receptor) positive or/and PR (progesterone receptor) positive. (b): Pearson Chi-square tests between pregnancy (non-abortion) group and pregnancy (abortion) group (c): Pearson Chi-square tests between pregnancy (non-abortion) group and lactation group.