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.

Ramiro et al. Arthritis Research & Therapy 2013 15:R14   doi:10.1186/ar4144