Table 3 Comparison of VAS and ODI Scores in the Two Groups

32

80

–

VAS leg pain

Pre-op

7.2 ± 0.8

7.0 ± 0.9

0.655

3 months Post-op

2.1 ± 0.6*

2.1 ± 0.5*

0.847

12 months Post-op

1.6 ± 0.5*

1.5 ± 0.5*

0.061

24 months Post-op

1.5 ± 0.5*

1.4 ± 0.5*

0.252

VAS back pain

Pre-op

5.6 ± 1.4

5.5 ± 1.5

0.672

3 months Post-op

2.3 ± 0.5*

2.5 ± 0.7*

0.249

12 months Post-op

2.1 ± 0.3*

2.2 ± 0.6*

0.335

24 months Post-op

1.8 ± 0.4*

2.0 ± 0.5*

0.328

ODI (%)

Pre-op

53.2 ± 4.6

52.9 ± 6.2

0.767

3 months Post-op

25.1 ± 3.7*

26.6 ± 4.2*

0.126

12 months Post-op

21.4 ± 2.6*

21.3 ± 2.8*

0.780

24 months Post-op

18.8 ± 2.1*

19.4 ± 2.1*

0.212