Table 1. Disease activity characteristics of gorups formed according to RF and/or ACPA
| Variable | RF–/ACPA– | RF+/ACPA+ | RF+/ACPA– | RF–/ACPA+ | p (K/W) | p (WT)* |
|---|---|---|---|---|---|---|
| N | 64 | 611 | 40 | 29 | ||
| DAS28 | 6.9±1.0 | 7.1±1.0 | 7.1±1.2 | 6.6±0.9 | 0.003 | 0.014 |
| SDAI | 47.8±15.0 | 49.8±14.7 | 53.1±16.5 | 42.3±12.7 | 0.008 | 0.004 |
| CDAI | 45.0±14.7 | 46.6±13.9 | 49.9±15.5 | 39.7±12.2 | 0.01 | 0.005 |
| SJC | 14.2±6.6 | 14.5±6.3 | 16.7±6.5 | 11.7±5.9 | 0.009 | 0.002 |
| TJC | 18.0±7.0 | 18.4±7.1 | 19.4±8.1 | 14.8±5.6 | 0.023 | 0.016 |
| CRP | 2.7±2.6 | 3.3±2.9 | 3.2±3.5 | 2.6±2.0 | ns | ns |
| ESR | 47.6±25.4 | 61.0±29.6 | 54.2±29.1 | 51.4±29.0 | 0.001 | ns |
*For comparison of RF+/ACPA– vs RF–/ACPA+ groups; K/W: Kruskal-Wallis, WT: Wilcoxon test.