Table 3.
Univariate and multivariate logistic regression analyses of ultrasonographic-verified structural damage of the Achilles
| Univariate analyses | Multivariate analyses | |||||
| OR | 95% CI | p Value | OR | 95% CI | p Value | |
| Age (years) | 1.04 | 1.02 to 1.07 | 0.001 | 1.04 | 1.02 to 1.07 | 0.001 |
| Female gender | 1.09 | 0.68 to 1.74 | 0.73 | – | – | – |
| Disease duration, years | 1.05 | 1.01 to 1.09 | 0.009 | – | – | – |
| Body mass index, kg/m2 | 1.07 | 1.01 to 1.13 | 0.02 | 1.07 | 1.01 to 1.14 | 0.02 |
| Currently smoking | 1.09 | 0.58 to 2.02 | 0.80 | – | – | – |
| Current use of steroids | 1.21 | 0.56 to 2.59 | 0.63 | – | – | – |
| Current use of bDMARDs | 1.84 | 1.11 to 3.07 | 0.02 | 1.83 | 1.08 to 3.12 | 0.03 |
| CRP, mg/L | 1.02 | 0.99 to 1.05 | 0.31 | – | – | – |
| ESR, mm/h | 1.01 | 0.99 to 1.03 | 0.29 | – | – | – |
| Regular physical exercise | 1.70 | 1.06 to 2.72 | 0.03 | 1.92 | 1.16 to 3.17 | 0.01 |
bDMARD, biological disease-modifying antirheumatic drug; CRP, C reactive protein; ESR, erythrocyte sedimentation rate.