Antibody status | n | Larsen's score (mean ± SEM) | P |
---|---|---|---|
RF positive | 552 | 49.1 ± 1.7 | <0.0001a |
RF negative | 268 | 33.0 ± 1.9 |  |
Anti-CCP positive | 672 | 46.9 ± 1.5 | <0.0001a |
Anti-CCP negative | 159 | 31.3 ± 2.4 |  |
RF positive/CCP positive | 493 | 49.6 ± 1.8 | <0.0001b |
RF positive/CCP negative | 39 | 37.6 ± 5.2 |  |
RF negative/CCP positive | 143 | 37.2 ± 2.7 |  |
RF negative/CCP negative | 109 | 28.0 ± 2.8 |  |