Table 2 Group comparison of different MRI parameters among healthy controls, non-severe AIS and severe-AIS subjects

VB

Wedge angle (˚)

2.3 ± 0.3

2.4 ± 0.4

2.6 ± 0.4

0.840

0.2 ± 0.2

2.3 ± 0.3^##

5.9 ± 0.4^{## ßß}

 < 0.001**

Height ratio (%)

-9.1 ± 0.5

-5.8 ± 0.8^##

-7.1 ± 0.7

0.008**

0.0 ± 0.3

4.6 ± 0.7^#

14.7 ± 1.1^{## ßß}

 < 0.001**

IVD

Wedge angle (˚)

0.3 ± 0.3

-1.0 ± 0.3^#

-0.2 ± 0.3

0.017*

-0.1 ± 0.2

2.7 ± 0.2^##

6.6 ± 0.5^{## ßß}

 < 0.001**

Height ratio (%)

0.1 ± 0.1

15.6 ± 3.4^##

15.7 ± 3.7^##

0.001**

1.9 ± 1.2

26.8 ± 3.4^#

75.1 ± 7.9^{## ßß}

 < 0.001**

NP/ IVD

Distance ratio (%)

42.0 ± 0.9

43.0 ± 1.2

44.0 ± 1.0

0.155

50.0 ± 0.5

58.0 ± 1.2^##

69.0 ± 0.8^{## ßß}

 < 0.001**