Table 1.

Comparison of VAS.

Follow-up time point	Low back pain		Leg pain
	Experimental group	Control group	Experimental group	Control group
Pre operation	3.2 ± 1.3	3.5 ± 1.4	6.7 ± 2.5	7.2 ± 1.9
3rd d post operation	2.1 ± 1.1*	2.6 ± 0.9*	2.3 ± 1.2***	3.1 ± 0.9***
1 mo post operation	1.8 ± 0.7**	2.1 ± 0.8**	1.9 ± 1.0	2.2 ± 1.3
3 mo post operation	1.5 ± 1.0	1.6 ± 0.9	1.5 ± 0.9	1.6 ± 1.0
6 mo post operation	1.5 ± 0.9	1.5 ± 1.1	0.8 ± 0.5	0.9 ± 0.4
12 mo post operation	1.4 ± 1.1	1.3 ± 0.8	0.8 ± 0.4	0.9 ± 0.3

VAS = visual analog scale.

^*,

^**, and

^*** mean that P < .05.