Fig. 2

Survival outcomes. a Investigator-assessed progression-free survival (PFS) in the overall population. b Overall survival (OS) in the overall population. The hazard ratio was estimated with the use of the Cox proportional-hazards model with stratification according to visceral metastatic disease (yes vs. no), menopausal status (pre-, peri- or postmenopausal), and sensitivity to prior endocrine therapy (yes vs. no)