Incidence rate ratio (IRR) data
| Test | IRR | 95% CI | p Value |
|---|---|---|---|
| CI, confidence interval; CRP, C reactive protein; LDH, lactate dehydrogenase; RF, rheumatoid factor. | |||
| Calcium | 0.38 | 0.37 to 0.39 | <0.001 |
| LDH | 0.21 | 0.16 to 0.29 | <0.001 |
| RF | 0.73 | 0.68 to 0.78 | <0.001 |
| CRP | 0.70 | 0.66 to 0.74 | <0.001 |









