From: Scoring radiographic progression in ankylosing spondylitis: should we use the modified Stoke Ankylosing Spondylitis Spine Score (mSASSS) or the Radiographic Ankylosing Spondylitis Spinal Score (RASSS)?
Relative contribution in each of the spinal segments of the RASSS (in %)
P value for the difference
Expected
Observed
Cervical segment (12 VCs)
43%
55%
0.09
Lumbar segment (12 VCs)
29%
0.04
Thoracic segment (4 VCs)
14%
16%
0.70