Table 6.

Independent prognostic factors from multivariate analysis for overall survival.

Factors	HR	95% CI for HR	P-value
Number of bone metastatic sites (<3 vs. ≥3)	1.513	(1.076~2.129)	0.017
Chemotherapy cycles (<6 vs. ≥6)	0.462	(0.237–0.899)	0.023