Fig. 1: Kaplan–Meier survival curves for breast cancer-specific survival by tumor subtype, overall and stratified by ER status, among node negative breast cancer cases in CBCS.

p values correspond to the log-rank test. The shaded regions correspond to the 95% confidence interval. BCSS = breast cancer-specific survival, CBCS = Carolina Breast Cancer Study, ER = estrogen receptor, IHC = immunohistochemistry, ER = estrogen receptor, IHC = immunohistochemistry, PAM50 = Prediction Analysis of Microarray 50.