Table 3

 Incidence rate ratio (IRR) data

TestIRR95% CIp Value
CI, confidence interval; CRP, C reactive protein; LDH, lactate dehydrogenase; RF, rheumatoid factor.
Calcium0.380.37 to 0.39<0.001
LDH0.210.16 to 0.29<0.001
RF0.730.68 to 0.78<0.001
CRP0.700.66 to 0.74<0.001