TABLE 4.

Univariable Analysis of OS Predictors Using Proportional Cox Regression Model

Variable	Hazard ratio	95% CI	P
Age	1.008	0.968–1.051	0.686
Overall disease duration	0.996	0.992–1.001	0.102
Time to mCRPC	0.998	0.992–1.003	0.422
Previous chemotherapy	0.851	0.437–1.657	0.636
Previous ²²³RaCl₂	0.875	0.362–2.115	0.767
More than 3 therapy lines	1.04	0.531–2.036	0.91
PSA at baseline	1.001	1–1.001	0.009
Hemoglobin at baseline	0.792	0.652–0.964	0.02
Tumor burden	1.001	1–1.001	0.021
%IDred LNM	1.017	0.997–1.037	0.089
%IDred BM	1.018	1.002–1.035	0.032
Baseline %ID LNM	1.024	0.93–1.128	0.627
Baseline %ID BM	1.001	0.971–1.033	0.971
Baseline %ID total	1.023	0.996–1.052	0.098