Table 1

Clinical evaluation and improvement at follow-up.

Results (x̅ ± SD)Improvement (%)Wilcoxon's Zp*
JOA score
Preoperatory
6 months postop
12 months postop
24 months postop
Nurick Scale
Preoperatory
6 months postop
12 months postop
24 months postop
VAS
Preoperatory
6 months postop
12 months postop
24 months postop
8.9 ± 1.8
14 ± 0.8
14.8 ± 0.8
14.9 ± 0.5

3.5 ± 0.6
1.6 ± 0.5
1.5 ± 0.5
1.5 ± 0.5

6.9 ± 0.8
0.06 ± 0.2
0.2 ± 0.5
0.6 ± 0.7
--
62.8
72.8
75

--
53.9
57.8
57.8

--
99.1
96.3
90.1
--
-3.52
-3.53
-3.53

--
-3.75
-3.75
-3.75

--
-3.56
-3.56
-3.57
--
p < 0.05
p < 0.05
p < 0.05

--
p < 0.05
p < 0.05
p < 0.05

--
p < 0.05
p < 0.05
p < 0.05

  • ↵* Wilcoxon´s test was used to calculate the differences between the preoperatory and postoperatory periods. Significant differences were found (p < 0.05).