Figure 3. Kaplan-Meier Curves of Progression-Free Survival (PFS) for Each Arm, When Considering All Events.

A, The PFS in the Clin^low CTC^low subgroup; B; The PFS in the Clin^high CTC^high subgroup; C, The PFS in the Clin^high CTC^low subgroup; D; The PFS in the Clin^low CTC^high subgroup. Clin^high indicates patients requiring chemotherapy according to the clinician-driven choice; Clin^low, patients requiring endocrine therapy according to the clinician-driven choice; CTC, circulating tumor cell; CTC^high, patients with ≥5 CTCs/7.5 mL; CTC^low, patients with <5 CTCs/7.5 mL; HR, hazard ratio.