Table 4 Comparison between large- and small-spinal cord compression angle groups.

From: Correlation of spinal cord compression angle and increased signal intensity on MRI in patients with ossification of posterior longitudinal ligament

 

Small-angle group (n = 76)

Large-angle group (n = 42)

P value

Spinal cord compression ratio (%)

29.30 ± 7.14

23.36 ± 5.57

 < 0.001

Maximum spinal canal occupying rate (%)

53.33 ± 10.05

59.35 ± 10.62

0.006

Cervical range of motion (°)

35.26 ± 11.00

36.78 ± 11.14

0.506

Segmental range of motion (°)

7.47 ± 4.13

7.25 ± 3.63

0.896

Cervical curvature

  

0.834

Lordosis

30 (39.5)

16 (38.1)

 

Straight

25 (32.9)

12 (28.6)

 

Kyphosis

21 (27.6)

14 (33.3)

 

ISI

  

0.009

Grade 0

41 (53.9)

13 (30.9)

 

Grade 1

25 (32.9)

17 (40.5)

 

Grade 2

10 (13.2)

12 (28.6)

 

JOA score

10.59 ± 1.78

9.79 ± 2.02

0.039

  1. Values are presented as n (%) or mean ± standard error of the mean.
  2. Large-angle group, spinal cord compression angle ≤ 35°; small-angle group, spinal cord compression angle > 35°.
  3. ISI, increased signal intensity; JOA, Japanese Orthopaedic Association.