Table 3. Univariate and multivariate COX risk regressions for progression of CRPC in prostate cancer patients.

Factors	Univariate COX regression			Multivariate COX regression
	HR	95%CI	P	HR	95%CI	P
Initial tPSA (≤200 ng/mL)	1.548	(1.112∼2.156)	0.010	1.470	1.050∼2.058	0.025
Prostatic volume (≤40 mL)
40∼60 mL	0.810	0.542∼1.211	0.305
>60 mL	1.198	0.799∼1.796	0.383
LDH (U/L)	1.001	1.000∼1.002	0.003	1.001	1.000∼1.002	0.013
Alkaline phosphatase(U/L)	1.000	1.000∼1.001	0.281