| Variable | 2009 (n=7,189) | 2014 (n=13,459) | P value |
|---|---|---|---|
| Age (mean ± SE, years) | 62.4±12.6 | 64.1±12.8 | <0.05 |
| Duration of disease (mean ± SE, years) | 12.7±10.7 | 13.0±12.9 | 0.68 |
| MHAQ score (median) | 0.25 | 0.13 | <0.05 |
| DAS28 CRP (median) | 2.9 | 2.4 | <0.05 |
| DAS28 ESR (median) | 3.6 | 3.0 | <0.05 |
| Total joint score (median) | 3.4 | 2.4 | <0.05 |
| Joint score: ROC analysis' cut-off value | 3.0 | 3.0 | |
| AUC | 0.72 | 0.68 | |