Multivariate linear/logistic regressions analyses of factors associated with radiographic sacroiliitis and mSASSS
| Radiographic sacroiliitis | mSASSS | ||||
|---|---|---|---|---|---|
| OR (95% CI) | p Value | Standard coefficient | Regression coefficient (95% CI) | p Value | |
| Smoker | NS | – | 0.09 | 0.54 (0.05 to 1.03) | 0.03 |
| HLA-B27 positivity | NS | – | NI | NI | – |
| Male sex | 1.48 (1.00 to 2.18) | 0.049 | 0.11 | 0.64 (0.17 to 1.12) | 0.01 |
| Family history of SpA | NI | – | −0.13 | −0.91 (−1.45 to −0.37) | 0.001 |
| Age at onset of IBP | 0.97 (0.95 to 0.99) | 0.004 | 0.23 | 0.08 (0.05 to 0.11) | <0.001 |
| CRP | 1.02 (1.01 to 1.03) | 0.02 | 0.14 | 0.32 (0.13 to 0.51) | 0.001 |
| Drinker | NS | – | NI | NI | – |
CRP, C-reactive protein; HLA, human leucocyte antigen; IBP, inflammatory back pain; mSASSS, modified Stoke ankylosing spondylitis spine score; NI, not included in the multivariate model; NS, non-significant in multivariate analysis; SpA, spondyloarthritis.