Table 4.

Comparison of VAS and ODI scores between the 2 groups before and after surgery.

	VAS scores			ODI scores
Groups	Preoperative	3 mo after surgery	6 mo after surgery	Preoperative	3 mo after surgery	6 mo after surgery
Observation group	7.00 ± 1.23	2.27 ± 1.04	1.60 ± 0.72	82.06 ± 7.43	21.36 ± 6.50	10.67 ± 4.68
Control group	7.27 ± 1.26	2.67 ± 0.76	1.87 ± 0.63	83.70 ± 7.54	23.50 ± 6.52	13.07 ± 5.39
t-value	−0.830	−1.694	−1.523	−0.845	−1.270	−1.841
P-value	.410	.096	.133	.401	.209	.071

ODI = Oswestry disability index.