Status and progression based on the modified Stoke Ankylosing Spondylitis Spine Score
| All radiographs (n=809) | Radiographs from '12 year completers’ (n=386)* | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Status scores† | Y0 (n=184) | Y2 (n=177) | Y4 (n=126) | Y6 (n=106) | Y8 (n=66) | Y10 (n=82) | Y12 (n=68) | Y0 (n=64) | Y2 (n=62) | Y4 (n=52) | Y6 (n=47) | Y8 (n=38) | Y10 (n=55) | Y12 (n=68) |
| Total mSASSS | 11.6 (16.1) | 12.8 (16.5) | 15.0 (16.7) | 16.8 (17.8) | 20.4 (19.8) | 21.0 (21.0) | 24.5 (21.7) | 11.2 (15.7) | 11.3 (14.3) | 15.0 (16.8) | 17.8 (18.9) | 21.3 (20.8) | 22.1 (21.4) | 24.5 (21.7) |
| Cervical segment | 6.0 (8.9) | 6.5 (9.2) | 7.7 (9.7) | 8.7 (10.3) | 10.4 (10.5) | 11.8 (11.7) | 13.7 (11.5) | 5.9 (8.9) | 6.1 (8.9) | 8.3 (10.1) | 9.3 (10.3) | 11.3 (10.7) | 12.0 (11.3) | 13.7 (11.5) |
| Lumbar segment | 5.6 (9.0) | 6.3 (9.3) | 7.3 (9.7) | 8.1 (10.2) | 9.9 (11.8) | 9.2 (11.0) | 10.8 (11.7) | 5.3 (7.8) | 5.2 (6.8) | 6.7 (8.2) | 8.5 (9.7) | 10.0 (11.3) | 10.2 (11.4) | 10.8 (11.7) |
| Progression scores | Y0–Y2 (n=164) | Y2–Y4 (n=115) | Y4–Y6 (n=93) | Y6–Y8 (n=52) | Y8–Y10 (n=41) | Y10–Y12 (n=55) | Y0–Y2 (n=60) | Y2–Y4 (n=50) | Y4–Y6 (n=42) | Y6–Y8 (n=29) | Y8–Y10 (n=31) | Y10–Y12 (n=55) | ||
| Total mSASSS | 1.8 (3.6) | 2.4 (4.1) | 1.8 (3.2) | 2.5 (3.8) | 1.9 (2.0) | 1.9 (3.2) | 1.9 (4.9) | 2.7 (3.9) | 2.0 (3.4) | 3.2 (4.7) | 2.1 (2.1) | 1.9 (3.2) | ||
| Cervical segment | 1.0 (2.2) | 1.5 (2.9) | 1.1 (1.9) | 1.5 (2.0) | 1.3 (1.6) | 1.1 (1.9) | 1.2 (3.2) | 1.5 (2.3) | 1.1 (1.5) | 1.7 (2.1) | 1.4 (1.7) | 1.1 (1.9) | ||
| Lumbar segment | 0.8 (2.2) | 0.9 (1.9) | 0.7 (1.9) | 1.0 (2.4) | 0.6 (1.1) | 0.8 (1.8) | 0.7 (2.0) | 1.2 (2.2) | 0.9 (2.6) | 1.4 (3.1) | 0.7 (1.2) | 0.8 (1.8) | ||
*Radiographs from patients with an mSASSS at year 12 evaluable (n=386).
†Status scores refer to all patients with an mSASSS evaluable at each time point, independent of the availability of a 2 year progression score.
mSASSS, modified Stoke Ankylosing Spondylitis Spine Score.