Table 1 Comparison of patient characteristics according to pre-existing L5-S1 degeneration

No

22

35

M/F

6/13

16/23

0.49

Age

58.5 ± 6.7

54.1 ± 8.3

0.11

VAS pre back

6.3 ± 2.9

6.3 ± 2.4

0.78

VAS pre leg

7.0 ± 2.4

7.1 ± 1.9

0.81

ODI pre

56.0 ± 15.3

55.2 ± 18.0

0.87

VAS post back

3.6 ± 2.7

3.1 ± 2.4

0.51

VAS post leg

2.8 ± 2.7

2.9 ± 2.7

0.94

ODI post

23.0 ± 20.9

19.5 ± 13.3

0.34

Satisfaction rate

78.8 ± 16.7

79.2 ± 14.7

0.98

DH pre

9.5 ± 2.6

10.7 ± 2.6

0.1

DH post

9.3 ± 2.6

10.7 ± 2.7

0.08

PI

53.8 ± 9.7

55.3 ± 10.0

0.59

PT

20.9 ± 7.8

21.0 ± 8.4

0.97

SS

30.6 ± 9.0

33.9 ± 8.1

0.18

L5-S1 seg angle pre

16.4 ± 7.3

15.6 ± 6.6

0.65