Logistic regression in the group that was not better explained by another diagnosis and without erosion typical for RA.
| Criteria | Exp ß (95% CI) | p |
|---|---|---|
| Symmetric arthritis (ACR criteria 4) | 2.96 (1.19–7.37) | 0.02 |
| Rheumatoid factor (positive or negative) | 3.23 (1.27–8.22) | 0.014 |
| Cyclic citrullinated peptide (negative, low, high) | 2.90 (1.6–5.23) | < 0.0001 |
| ESR or CRP | 2.67 (1.01–7.05) | 0.03 |
| Joint (0 to 5 points) | 1.33 (1.02–1.73) | 0.032 |
ESR: erythrocyte sedimentation rate; CRP: C-reactive protein.