Fig.3

a Kaplan–Meier analyses of the effect chemotherapy on OS in original samples (P = 0.639, log-rank test); b Kaplan–Meier analyses of the effect chemotherapy on BCSM in original samples (P = 0.001, log-rank test); c Kaplan–Meier analyses of the effect chemotherapy on OS in matched samples (P = 0.962, log-rank test); d Kaplan–Meier analyses of the effect chemotherapy on BCSM in matched samples (P = 0.002, log-rank test)