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 |