Multivariate regression analysis
| OR | 95% CI | P value | |
| DAS28 | 1.18 | 0.37 to 3.20 | 0.76 |
| Age at baseline | 0.95 | 0.93 to 0.98 | 0.01 |
| Methotrexate | 2.82 | 0.82 to 17.70 | 0.16 |
| Health Assessment Questionnaire | 1.89 | 1.14 to 3.16 | 0.01 |
DAS28, 28-joint Disease Activity Score.