Table 3

Multivariate logistic regression analysis of factors associated with MRI inflammatory lesions and radiographic sacroiliitis

MRI inflammatory lesions (SIJ or spine)MRI inflammatory lesions of the SIJMRI inflammatory lesions of the spineRadiographic sacroiliitis
OR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p Value
HLA-B27 positivity2.08 (1.44 to 3.01)<0.0012.13 (1.44 to 3.15)<0.0011.59 (1.02 to 2.46)0.041.56 (1.04 to 2.33)0.03
Caucasian raceNSNS0.49 (0.27 to 0.86)0.01NSNSNSNS
Male gender1.80 (1.27 to 2.56)0.0011.85 (1.28 to 2.66)0.0012.07 (1.37 to 3.12)0.0011.56 (1.07 to 2.28)0.02
Age at onset of IBP0.98 (0.96 to 1.00)0.0450.97 (0.95 to 0.99)0.01NSNS0.97 (0.95 to 0.99)0.04
Family history of SpANSNSNSNSNSNSNSNS
CRP1.02 (1.00 to 1.03)0.011.01 (1.00 to 1.03)0.0471.02 (1.00 to 1.03)0.011.02 (1.01 to 1.03)0.03
  • CRP, C reactive protein; HLA-B27, human leucocyte antigen B27; IBP, inflammatory back pain; NS, not significant in multivariate analysis; SIJ, sacroiliac joints; SpA, spondyloarthritis.