Table 2

MRI status over time according to the ASAS/OMERACT MRI working group definition in 68 patients with early inflammatory low back pain who were included in the ESpAC

MRI availability
No of patientsBaseline1 Year2 YearsHLA-B27 positive
9+++8
5++NA4
2++2
1++0
2+0
2+NA+1
2+NA0
1+NANA1
266
2+0
7NA3
1++1
1+0
2+NA2
5NANA3
  • +, positive MRI; –, negative MRI.

  • ASAS, Assessment of SpondyloArthritis Society; ESpAC, Early Spondyloarthritis Cohort; HLA-B27, human leucocyte antigen B27; NA, not available; OMERACT, Outcome Measures in Rheumatoid Arthritis Clinical Trials.