Table 4. Cox regression for distant recurrence-free survival.

	Hazard Ratio (95%CI) for distant recurrence	P Value
Multivariate analysis before matching
Anaesthesia with TEA vs. Anaesthesia with iv Analgesia	0.58 (0.27-1.29)	0.1816
Age (year)	0.98 (0.92-1.04)	0.4979
ASA*	0.96 (0.55-1.69)	0.8886
Preoperative PSA (ng/ml)	1.00 (0.99-1.01)	0.7711
Lymph nodes
Positive vs. Negative	3.45 (1.25-9.53)	0.0169
Specimen Gleason score*	1.41 (1.00-1.98)	0.0485
Fentanyl (mg)	1.03 (0.24-4.45)	0.9670
Transfusion
Yes vs. No	1.25 (0.47-3.32)	0.6611
Surgical margin
Positive vs. Negative	1.15 (0.50-2.65)	0.7481
Univariate analysis after matching
Anaesthesia with TEA vs. Anaesthesia with iv Analgesia	0.56 (0.26-1.25)	0.1573