Table 2.

Characteristics of block between three groups

	BN group (n = 30)	BF group (n = 30)	BD group (n = 30)	P value
Time from injection to highest sensory level (min)	6.45 ± 1.67	7.17 ± 1.45	6.28 ± 1.75	0.08
Time of two segment regression from the highest sensory level (min)	69.33 ± 6.67	88.90 ± 12.85	149.00 ± 23.17	< 0.001
Time for sensory regression to S1 from highest sensory level (min)	241.83 ± 22.26	329.83 ± 44.10	560.53 ± 81.86	< 0.001
Onset to Bromage 3 (min)	5.55 ± 167	5.05 ± 1.81	4.80 ± 1.74	0.24
Regression to Bromage 0 (min)	147.03 ± 33.05	185.56 ± 35.87	331.60 ± 73.96	< 0.001
Time to rescue analgesia (min)	221.83 ± 22.26	296.33 ± 44.83	496.63 ± 70.19	< 0.001
NRS six hours after surgery	6.30 ± 1.17	6.16 ± 1.44	1.90 ± 0.84	< 0.001