Table 3.

Multivariate analysis of factors affecting biochemical free survival

Factor	HR (95% CI)	p-value
T-stage	1.84 (1.073–3.155)	0.027
T1-T2	1 (reference)	–
T3-T4	2.886 (1.408–5.916)	0.004
GS	1.219 (0.887–1.677)	0.222
< 8	1 (reference)	–
8–10	2.449 (1.214–4.940)	0.012
nPSA (ng/ml)	2.306 (1.503–3.537)	<0.001
< 0.06	1 (reference)	–
≥ 0.06	4.409 (2.180–8.916)	<0.001
bPSA (ng/ml)	1.003 (0.992–1.014)	0.649
≤ 20 ng/ml	1 (reference)	–
> 20 ng/ml	1.641 (0.765–3.520)	0.203
RT dose (Gy)	0.916 (0.738–1.137)	0.425