Figure 2: Proportions of samples in axial spondyloarthritis (axSpA) and blood donor (BD) groups positive for IgG antibodies against C. pneumoniae, C. trachomatis, B. burgdorferi, B. afzelii, B. garinii, and Ehrlichia. Samples were considered positive if the antibody titer of the sample was above the cutoff value (three standard deviations above the mean OD value of the blood donors for each antigen, mean+3SD).
Significance of Fisher’s exact test is indicated with the following convention: ***p < 0.001; axSpA: axial spondyloarthritis; BD: blood donors.