TABLE 2.

Univariable Analysis of PFS Predictors Using Proportional Cox Regression Model

Variable	Hazard ratio	95% CI	P
Age	0.961	0.925–0.999	0.045
Overall disease duration	0.999	0.995–1.003	0.632
Time to mCRPC	0.997	0.992–1.002	0.29
Previous chemotherapy	0.913	0.51–1.634	0.759
Previous ²²³RaCl₂	0.852	0.378–1.917	0.699
More than 3 therapy lines	0.81	0.446–1.472	0.49
PSA at baseline	1	1–1.001	0.092
Hemoglobin at baseline	0.863	0.842–1.155	0.863
Tumor burden	1	1–1.001	0.6
%IDred LNM	1.026	1.011–1.042	0.001
%IDred BM	1.021	0.006–1.038	0.008
Baseline %ID LNM	0.946	0.855–1.046	0.279
Baseline %ID BM	0.983	0.953–1.015	0.29
Baseline %ID total	0.997	0.968–1.026	0.83