Table 1.

Demographic data

	CFNB/SA	CFNB/SAMO	p-value
	(n = 33)	(n = 35)
Age (yr)	68.06 (8.37)	69.60 (7.39)	0.42
Weight (kg)	59.88 (14.42)	62.00 (12.72)	0.52
Height (cm)	154.76 (6.19)	155.86 (6.94)	0.49
Body mass index (BMI) (kg/m2)	26.39 (5.61)	25.74 (4.49)	0.60
ASA (I/II/III)	0/13/20	1/7/27	0.11
Surgical time (mins)	155.30 (34.41)	145.86 (39.06)	0.30

Data are expressed as number of patients or mean (SD); CFNB/SA Continuous femoral nerve block/Spinal anesthesia; CFNB/SAMO Continuous femoral nerve block/Spinal anesthesia plus Morphine