Safety and Efficacy of Long-Term Zoledronic Acid in Advanced Breast Cancer with Bone Metastasis in South China

Figure 3

Difference in skeletal-related event-free survival in breast cancer with bone metastasis between group A (ZA 6–24 months) and group B (ZA > 24 months). Kaplan–Meier analysis was used to compare the SRE free survival between the two groups.