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 SIJ | MRI inflammatory lesions of the spine | Radiographic sacroiliitis | |||||
|---|---|---|---|---|---|---|---|---|
| OR (95% CI) | p Value | OR (95% CI) | p Value | OR (95% CI) | p Value | OR (95% CI) | p Value | |
| HLA-B27 positivity | 2.08 (1.44 to 3.01) | <0.001 | 2.13 (1.44 to 3.15) | <0.001 | 1.59 (1.02 to 2.46) | 0.04 | 1.56 (1.04 to 2.33) | 0.03 |
| Caucasian race | NS | NS | 0.49 (0.27 to 0.86) | 0.01 | NS | NS | NS | NS |
| Male gender | 1.80 (1.27 to 2.56) | 0.001 | 1.85 (1.28 to 2.66) | 0.001 | 2.07 (1.37 to 3.12) | 0.001 | 1.56 (1.07 to 2.28) | 0.02 |
| Age at onset of IBP | 0.98 (0.96 to 1.00) | 0.045 | 0.97 (0.95 to 0.99) | 0.01 | NS | NS | 0.97 (0.95 to 0.99) | 0.04 |
| Family history of SpA | NS | NS | NS | NS | NS | NS | NS | NS |
| CRP | 1.02 (1.00 to 1.03) | 0.01 | 1.01 (1.00 to 1.03) | 0.047 | 1.02 (1.00 to 1.03) | 0.01 | 1.02 (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.