Disease duration and gender are two clinical variables associated with radiographic severity in ankylosing spondylitis
| Disease duration | Gender (female=0; male=1) | Disease duration * gender | ||||
|---|---|---|---|---|---|---|
| β | p Value | β | p Value | β | p Value | |
| (a) Cervical mSASSS | ||||||
| Combined cohorts | 0.25 (0.16 to 0.34) | 2.01×10−8 | 1.54 (−1.14 to 4.21) | 0.26 | 0.22 (0.12 to 0.32) | 3.1×10−5 |
| (b) Lumbar mSASSS | ||||||
| Combined cohorts | 0.20 (0.12 to 0.28) | 7×10−7 | 2.26 (−0.16 to 4.67) | 0.07 | 0.17 (0.08 to 0.27) | 2.1×10−4 |
| (c) Total mSASSS | ||||||
| Combined cohorts | 0.45 (0.31 to 0.60) | 1.7×10−9 | 3.9 (−0.57 to 8.38) | 0.09 | 0.40 (0.22 to 0.57) | 7.9×10−6 |
Regression coefficients computed by taking the latest radiograph per patient unless it has the maximum score, in that case the previous radiograph is taken.
mSASSS, modified Stoke Ankylosing Spondylitis Spinal Score.