Table 4

Non-axial enthesitis/osteitis and synovitis/bursitis on MRI

ASnr-axSpATotalp Value*
Enthesitis/osteitis
 Score mean (SD)1.1 (1.2)0.4 (0.7)0.8 (1)0.0133†
 No of lesions281341
 No of patients2212340.0449‡
 Sternoclavicular joint, n527
 Sternal synchondrosis, n213
 Iliac crest entheses, n101
 Ischial tuberosity, n325
 Sacrococcygeal entheses, n10111
 Pubic symphysis, n112
 Hip, n101
 Great trochanter, n202
 Knee, n112
 Achilles entheses, n112
 Plantar fascia entheses, n123
 Mid-foot entheses, n022
Synovitis/bursitis
 Score mean (SD)1.4 (1.6)1.6 (1.6)1.5 (1.6)0.6041†
 No of lesions343670
 No of patients2322450.8503‡
  • *For the difference between ankylosing spondylitis and non-radiographic axial spondyloarthritis.

  • †Wilcoxon.

  • ‡χ2.

  • AS, ankylosing spondylitis; n, number of patients affected; nr-axSpA, non-radiographic axial spondyloarthritis.