Table 5

Multivariate logistic regressions analyses of factors associated with MRI structural lesions

MRI structural lesions (sacroiliac joints or spine)MRI sacroiliac joint structural lesionsMRI spine structural lesions
OR (95% CI)p ValueOR (95% CI)p ValueOR (95% CI)p Value
Smoker1.56 (1.08 to 2.26)0.021.54 (1.05 to 2.26)0.032.02 (1.15 to 3.55)0.01
HLA-B27 positivityNSNSNI
Age at onset of IBPNI0.97 (0.95 to 1.00)0.02NI
IBP duration1.26 (0.03 to 1.54)0.02NINI
  • CRP, C-reactive protein; HLA, human leucocyte antigen; IBP, inflammatory back pain; NI, not included in the multivariate model; NS, non-significant in multivariate analysis.