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

Figure 2

Differences in the types of SREs in breast cancer with bone metastasis between group A (ZA 6–24 months) and group B (ZA > 24 months). The chi-square test revealed that there was no significant difference in the proportion of each SRE type between the two groups ( = 0.168).