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 fat metaplasia. Adjusted R2 = 0.18. Variables not included in the model: age, sex, symptom duration, treatment, baseline ASDAS, baseline and 2-year change in C-reactive protein, baseline SPARCC SIJ inflammation score, baseline SSS for backfill, and baseline SSS for erosion. ASDAS, Ankylosing Spondylitis Disease Activity Score; SE, standard error; SIJ, sacroiliac joint; SPARCC, Spondyloarthritis Research Consortium of Canada; SSS, sacroiliac joint structural score.