Logistic regression analysis of factors predicting radiographic erosions at one year in patients with early arthritis
| All patients (n = 188) | RA patients (n = 98) | RF+ RA patients (n = 62) | ||||||
|---|---|---|---|---|---|---|---|---|
| Parameters of final model | OR (95%CI) | p Value | Parameters of final model | OR (95%CI) | p Value | Parameters of final model | OR (95%CI) | p Value |
| Granzyme B and prednisone use were added as categorical variables. NS, non-significant variable eliminated from final model. | ||||||||
| CI, confidence interval; CRP, C reactive protein; OR, odds ratio; SJC, swollen joint count; RA, rheumatoid arthritis; RF(+), rheumatoid factor (positive). | ||||||||
| RF | 2.22 (1.10 to 4.50) | 0.03 | RF | NS | RF | NS | ||
| Shared epitope | 2.27 (1.14 to 4.50) | 0.02 | Shared epitope | 2.42 (1.0 to 5.9) | 0.05 | Shared epitope | NS | |
| CRP | 1.15 (1.01 to 1.31) | 0.04 | CRP | 1.21 (0.99 to 1.49) | 0.07 | CRP | NS | |
| SJC | 1.04 (1.01 to 1.08) | 0.02 | SJC | NS | SJC | 1.067 (1.00 to 1.14) | 0.04 | |
| Granzyme B | NS | Granzyme B | 3.09 (0.90 to 11.20) | 0.09 | Granzyme B | 4.83 (1.13 to 20.59) | 0.03 | |
| Overall model fit (log score) | p<0.001 | Overall model fit (log score) | p = 0.007 | Overall model fit (log score) | p = 0.016 | |||
| c Index | 0.75 | c Index | 0.74 | c Index | 0.72 | |||