Result of four different multiple regression analyses with radiological outcome at 24 months as dependent variable, and as independent variables baseline values of Larsen score, swollen joint count, and one of each: IgA-RF, IgG-RF, IgM-RF, or anti-CCP antibodies, respectively in patients with early rheumatoid arthritis
| Variable | Regression analyses | |||||||
|---|---|---|---|---|---|---|---|---|
| B | p Value | B | p Value | B | p Value | B | p Value | |
| Anti-CCP, antibodies to cyclic citrullinated peptide; RF, rheumatoid factor. | ||||||||
| Larsen score | 0.97 | <0.0001 | 0.95 | <0.0001 | 0.99 | <0.0001 | 0.97 | <0.0001 |
| Swollen joints | 0.28 | <0.01 | 0.20 | <0.05 | 0.30 | <0.01 | 0.31 | <0.01 |
| IgA-RF | 4.0 | <0.01 | – | – | – | – | – | – |
| IgG-RF | – | – | 2.8 | <0.05 | – | – | – | – |
| IgM-RF | – | – | – | – | 4.2 | <0.05 | – | – |
| Anti-CCP | – | – | – | – | – | – | 2.8 | <0.05 |
| R 2 | 50.9% | 50% | 50% | 49.4% | ||||
| R2 adjusted | 49.5% | 48.6% | 48.6% | 48.0% | ||||