Table 2 Comparisons of outcome factors examined preoperatively versus postoperatively within groups and between the AS and No-AS groups within time points

JOA

9.8 ± 2.2

14.6 ± 1.6*

10.1 ± 3.6

14.9 ± 2.9*

NDI

46.3 ± 7.2

19.6 ± 3.1*

45.3 ± 5.9

16.1 ± 2.3*

VAS for neck pain

6.9 ± 3.5

3.3 ± 1.2*^,**

6.7 ± 2.8

1.8 ± 0.9*^,**

VAS for arm pain

6.3 ± 2.1

1.6 ± 0.7*

6.5 ± 2.1

1.3 ± 0.9*

ROM

7.2 ± 2.1°

6.3 ± 1.8°*

7.9 ± 1.8°

8.8 ± 2.7°*

FSU angle

0.6 ± 0.3°

−0.1 ± 5.2**^,*

0.7 ± 0.2°

5.0 ± 3.9°**^,*

Disc height

7.0 ± 1.3

8.2 ± 1.1*

7.1 ± 0.9

7.9 ± 1.2*