Fig. 3

Cumulative probability plots for structural lesions according to Spondyloarthritis Research Consortium of Canada (SPARCC) sacroiliac joint (SIJ) score (≥2 vs <2): erosion (a), backfill (b), and fat metaplasia (c)
Cumulative probability plots for structural lesions according to Spondyloarthritis Research Consortium of Canada (SPARCC) sacroiliac joint (SIJ) score (≥2 vs <2): erosion (a), backfill (b), and fat metaplasia (c)