Multivariate stepwise regression analyses of data from 147 patients with axial spondyloarthritis followed over 2 years assessing the associations between treatment and development of erosion or fat metaplasia
Dependent variable: 2-year change in SSS for erosion. Adjusted R2 = 0.45. Variables not included in the model: age, sex, symptom duration, baseline Ankylosing Spondylitis Disease Activity Score, baseline SPARCC SIJ inflammation score, and baseline SSS for ankylosis. SE, standard error; SIJ, sacroiliac joint; SPARCC, Spondyloarthritis Research Consortium of Canada; SSS, Sacroiliac Joint Structural Score; TNFα, tumor necrosis factor alpha.