Table 3 Postoperative patient characteristics in the two groups

VAS for LBP

Pre-op

3.7 ± 3.0

3.7 ± 2.8

0.980

6-month f/u

1.1 ± 1.5

2.2 ± 2.4

0.049*

1-year f/u

1.0 ± 1.8

0.8 ± 1.3

0.589

VAS for leg pain

Pre-op

5.5 ± 2.3

5.3 ± 2.2

0.746

6-month f/u

1.9 ± 2.5

1.7 ± 2.3

0.745

1-year f/u

1.1 ± 2.2

0.9 ± 1.6

0.702

ODI

Pre-op

52.3 ± 16.5

51.9 ± 16.3

0.916

6-month f/u

15.2 ± 15.7

25.1 ± 21.1

0.050*

1-year f/u

14.1 ± 16.1

13.9 ± 15.4

0.952

Bridwell Grade one fusion

1-year f/u

84%

86%

0.188