Table 4.
Feasibility of the RASSS - availability of the four thoracic vertebral corners added to the RASSS.
| Availability of the four VCs added in the RASSS | All radiographs with RASSS evaluable (n = 629)* |
All radiographs from patients with RASSS available at year 12 (n = 341)* |
All baseline radiographs from patients with baseline - year 2 RASSS interval available (n = 134)* |
|||
|---|---|---|---|---|---|---|
| N | % | N | % | n | % | |
| - 1 VC only | 65 | 10% | 28 | 10% | 18 | 13% |
| - 2 VCs | 297 | 47% | 139 | 50% | 71 | 53% |
| - 3 VCs | 41 | 7% | 18 | 7% | 11 | 8% |
| - 4 VCs | 226 | 36% | 92 | 33% | 34 | 25% |
*n = number of radiographs. mSASSS, modified Stoke Ankylosing Spondylitis Spine Score; RASSS, radiographic Ankylosing Spondylitis Spinal Score; VC, vertebral corner.