Table 1.

Clinical parameters of patients

Characteristic	Value
Sex, male:female	4:10
Age (yr)	59.5±7.2
Follow-up period (mo)	11.0±5.0
Estimated blood loss (mL)	85.0±29.5
Operation time (min)	72.8±15.5
VAS of leg
Preoperative	8.4±1.1
Postoperative	2.8±1.4
ODI
Preoperative	60.2±5.5
Postoperative	22.1±3.4
MacNab criteria
Excellent	3
Good	7
Fair	3
Poor	1
Complication
Abdominal pain (perirenal fluid collection)	2 (1)

Values are presented as number or mean standard deviation.

VAS, visual analogue scale; ODI, Oswestry Disability Index.