Table 1.

Comparison of pre- and postoperative variables using paired t-test

Variable	Preoperative	Postoperative	t-value
Back pain (1=present, 0=absent)	0.88±0.32	0.35±0.48	5.93**
Straight-leg raising (1=positive, 0=negative)	0.86±0.35	0.02±0.15	12.69**
Motor weakness (1=present, 0=absent)	0.77±0.43	0.37±0.49	3.93**
Perianal sensation (1=present, 0=absent)	0.09±0.29	0.56±0.5	6.04**
Voluntary anal contraction (1=present, 0=absent)	0.07±0.26	0.28±0.45	2.46*
Urodynamic-study (1=normal, 0=abnormal)	0	0.58±0.5	7.64**
Oswestry Disability Index (scale of 0–100)	64.95±9.29	9.44±11.2	28.29**
Visual Analog Scale–back pain (scale of 0–10)	6.72±1.67	0.79±1.13	20.26**
Visual Analog Scale–leg pain (scale of 0–10)	7.33±1.74	0.72±1.12	22.75**
Bulbocavernosus reflex (1=present, 0=absent)	0.93±0.26	0.67±0.47	2.89**
Perianal numbness (1=present, 0=absent)	0.95±0.21	0.6±0.5	4.32**
Duration of numbness (day)	0.95±0.21	0.93±0.26	1.00 (NS)

Values are presented as mean±standard deviation.

NS, not significant.

^*p<0.05.

^**p<0.01.