Table 2 Comparison of the VAS and ODI scores of the patients between pre- and post-operation (\( \overline{\mathrm{x}} \) ± SD)

VAS score

P value

Pre-operation

7.80 ± 1.438

Post-operation (4 h)

2.08 ± 0.797

< 0.001

Post-operation (1 m)

1.42 ± 0.496

< 0.001

Post-operation (6 m)

1.18 ± 0.391

< 0.001

Post-operation (12 m)

1.23 ±0 .430

< 0.001

ODI score

P value

Pre-operation

68.69 ± 1.288

Post-operation (1 m)

27.03 ± 0.763

< 0.001