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Table 3 Radiologic parameters of various ligamentous injuries

From: Can radiologic parameters used to detect cervical spinal instability be used in patients with ankylosing spondylitis?

 

Control

Ankylosing spondylitis

p-value

n

39

39

 

BDI (mm, mean (SD))

5.3 (1.6)

5.1 (2.0)

0.544

BAI (mm, mean (SD))

5.6 (2.2)

4.9 (2.4)

0.180

Basis–C1 (mm, mean (SD))

32.8 (2.4)

31.7 (3.0)

0.092

Dens–opisthion (mm, mean (SD))

36.4 (3.0)

36.7 (3.1)

0.692

Powers ratio 1 (mean (SD))

0.90 (0.08)

0.87 (0.10)

0.080

C1–opisthion (mm, mean (SD))

42.5 (3.5)

42.8 (3.4)

0.690

Powers ratio 2 (mean (SD))

0.78 (0.07)

0.74 (0.07)

0.059

Basis–C2 (mm)

42.05 (3.32)

40.76 (3.39)

0.092

C2–ophistion (mm)

44.49 (5.96)

43.90 (5.34)

0.644

Lee X-line ratio

0.96 (0.17)

0.94 (0.13)

0.484

Pathological X-line (n (%))

11 (28.2)

11 (28.2)

1.000

Chamberlain line length (mean (SD))

82.07 (3.99)

81.58 (3.75)

0.591

Pathological chamberlain line (n (%))

7 (17.9)

8 (20.5)

1.000

McCrae’s line length (mean (SD))

37.60 (2.56)

37.37 (3.57)

0.747

Pathological McCrae's line (n (%))

0 (0.0)

0 (0.0)

1.000

PADI (mm, mean (SD))

21.3 (2.3)

21.0 (2.1)

0.523

C2–C3 angulation (endplate) (°, mean (SD))

1.9 (5.2)

1.8 (5.6)

0.910

C2–C3 angulation (posterior wall) (°, mean (SD))

6.3 (6.6)

8.0 (7.0)

0.272

End plate tilt C4–C5 (°, mean (SD))

− 1.4 (5.9)

1.6 (8.6)

0.082

End plate tilt C5–C6 (°, mean (SD))

1.8 (5.6)

2.6 (7.4)

0.597

Displacement C4–C5 (mm, mean (SD))

0.6 (1.1)

0.4 (1.2)

0.642

Displacement C5–C6 (mm, mean (SD))

0.3 (0.9)

0.4 (1.0)

0.651

Soft-tissue shadow C3 (mm, mean (SD))

6.1 (4.3)

4.6 (2.6)

0.070

Soft-tissue shadow C6 (mm, mean (SD))

12.4 (4.0)

13.8 (3.5)

0.107