Figure 2. Unadjusted Survival Curves of the Pooled Cohort of Patients From the National Cancer Database (NCDB) and SUCCESS Cohorts.

Unadjusted survival curves based on Kaplan-Meier estimates for patients with primary breast cancer who were positive (left) or negative (right) for circulating tumor cells (CTCs) and treated with or without radiotherapy (RT) from a pooled cohort of both cohorts for overall survival. Patients were grouped by receipt of breast-conserving surgery (A) or mastectomy (B). TR indicates time ratio.