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Table 6 Ratio of 2-year progression in each of the spinal segments of the RASSS.

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) 43% 29% 0.04
Thoracic segment (4 VCs) 14% 16% 0.70
  1. *n = 330 represents progression intervals. RASSS, radiographic Ankylosing Spondylitis Spinal Score; NA, not applicable.