Table 2.

Surgical outcomes

Outcome	NN	STN	LTN	F/${\chi }^2$	p
Preoperative	N = 61	N = 74	N = 43
NRS-LP	5.44 (1.91)	4.81 (1.98)	4.06 (2.16)*	5.937	0.003
NRS-LN		5.82 (1.67)	6.60 (1.53)#		0.014
SF-36	71.30 (6.06)	68.39 (5.53)*	63.56 (6.77)*#	20.840	< 0.001
ODI	62.76 (13.75)	59.80 (15.95)	54.30 (19.38)*	3.252	0.042

Outcome	NN	STN	LTN	F/${\chi }^2$	p
3 Months after operation	N = 59	N = 71	N = 43
NRS-LP	1 (0,2)	2 (0,2)	2 (0,2)*	9.245	0.011
NRS-LN		3 (2,4)	5 (4,6)#		< 0.001
SF-36	83.32 (7.20)	81.85 (6.46)	76.47 (6.72)*#	13.612	< 0.001
ODI	22 (18,29)	24 (20,29)	28 (24,32)*	8.258	0.013

Outcome	NN	STN	LTN	F/${\chi }^2$	p
6 Months after operation	N = 59	N = 69	N = 41
NRS-LP	1 (0,1)	1 (0,2)	1 (1,2)*	7.609	0.023
NRS-LN		3 (2,3)	3 (2,3)		0.058
SF-36	85.25 (6.52)	82.72 (6.67)*	77.80 (6.96)*#	15.272	< 0.001
ODI	20 (16,24)	22 (18,24)	26 (22,29)*#	20.548	< 0.001

Outcome	NN	STN	LTN	F/${\chi }^2$	p
12 Months after operation	N = 57	N = 68	N = 41
NRS-LP	1 (0,1)	1 (0,1)	1 (1,1)	4.370	0.112
NRS-LN		1 (1,2)	3 (2,4)#		< 0.001
SF-36	86.75 (6.25)	84.97 (5.63)	80.22 (6.03)*#	14.913	< 0.001
ODI	18 (14,22)	20 (16,22)	22 (20,25)*#	14.886	0.001

Outcome	NN	STN	LTN	F/${\chi }^2$	p
24 Months after operation	N = 61	N = 74	N = 43
NRS-LP	0 (0,1)	0 (0,1)	1 (0,1)*	6.828	0.033
NRS-LN		2 (1,3)	3 (2,3)#		< 0.001
SF-36	86.10 (6.02)	84.09 (5.59)	78.93 (6.57)*#	18.651	< 0.001
ODI	18 (15,22)	18 (16,20)	21 (19,24)*#	13.578	0.001

NN—no numbness group, STN—short-term numbness group, LTN—long-term numbness group, NRS-LP—Numerical Rating Scale of leg pain, NRS-LN—Numerical Rating Scale of leg numbness, SF-36—Short-Form Health Survey, ODI—Oswestry Disability Index.

*Represents a statistically difference compared with NN group

^#Represents a statistically difference compared with STN group