Item

VAS

JOA

NDI

Before surgery

7 ± 1.1

10.7 ± 1.3

36.1 ± 3.8

Last follow-up

3.4 ± 1.1

15.5 ± 1.2

14.6 ± 3.0

t

14.3

23.9

27.1

P

<0.001

<0.001

<0.001