Patients’ characteristics
PD
REGRESSION, EVENT
A total of 980 BC patients received NAC. Of them, 317 patients were with no response to NAC (297 of SD and 20 of PD). The mean age was 49.3 years old (ranging from 20 to 72). 2 patients refused to receive follow-up. Of the rest 315 patients, the mean follow-up time was 40.4 months (range from 2 to 101). Totally, 82 cases had an event during the follow-up time. 251 patients were with a follow-up time of more than 1 year, and 30 patients had an event within 1 year. Stage T (Clinicopathological features of patients in 1-year cohort and 5-year cohortCox regression of the patients’ cohort using univariate and multivariate analysis