Univariate regression analyses of associations between baseline levels of laboratory markers, demographic variables, disease duration and Sharp Progression Score (SharpProgScore) and the Rheumatoid Arthritis Articular Damage (RAAD) score as the dependent variables
| SharpProgScore B (95% CI) | p Value | RAAD score B (95% CI) | p Value | |
| Calprotectin | 1.22 (0.34 to 2.10) | 0.007 | 0.40 (0.14 to 0.65) | 0.003 |
| CRP | 0.72 (0.29 to 1.14) | 0.001 | 0.20 (0.076 to 0.33) | 0.002 |
| ESR | 0.32 (0.076 to 0.57) | 0.011 | 0.087 (0.014 to 0.16) | 0.019 |
| Anti-CCP | 0.11 (0.061 to 0.16) | <0.001 | 0.019 (0.005 to 0.034) | 0.009 |
| Age | −0.18 (−0.59 to 0.23) | 0.40 | 0.050 (−0.071 to 0.17) | 0.42 |
| Gender | 4.60 (−7.42 to 16.62) | 0.45 | 1.37 (−2.16 to 4.90) | 0.44 |
| Disease duration | 1.83 (−2.59 to 6.25) | 0.41 | 1.73 (0.47 to 3.00) | 0.008 |
Anti-CCP, antibodies to cyclic citrullinated peptide; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate.