Table 6. Cox regression of overall survival.

	Hazard Ratio (95%CI)for Any Death	P Value
Multivariate analysis before matching
Anaesthesia with TEA vs. Anaesthesia with iv Analgesia	1.79 (0.95-3.39)	0.0710
Age (yrs)	1.01 (0.96-1.07)	0.6772
ASA Classification	0.99 (0.62-1.60)	0.9725
Preoperative PSA (ng.ml-1)	1.00 (0.99-1.01)	0.6116
Lymph nodes
Positive vs. Negative	1.50 (0.70-3.22)	0.2993
Specimen Gleason score*	1.85 (1.38-2.48)	<0.0001
Fentanyl (mg)	1.31 (0.40-4.29)	0.6537
Transfusion
Yes vs. No	1.01 (0.42-2.46)	0.9808
Surgical margin
Positive vs. Negative	1.23 (0.60-2.50)	0.5694
Univariate analysis after matching
Anaesthesia with TEA vs. Anaesthesia with iv Analgesia	1.17 (0.63-2.17)	0.6105