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Table 4 Pearson’s correlation coefficient of the correlations between baseline Brucella antibody titers with different baseline variables (n = 94)

From: Lack of correlation of Brucella antibody titers with clinical outcomes and culture positivity of brucellosis

Variable R with Brucella melitensis antibody titer (P value) R with Brucella abortus antibody titer (P value)
Age −0.05 (0.65) − 0.04 (0.71)
Location 0.04 (0.73) 0.2 (0.05)
Culture positivity 0.14 (0.17) 0.29 (0.004)a
Arthralgia 0.02 (0.86) 0.09 (0.4)
Complicated brucellosis −0.09 (0.37) −0.25 (0.02)b
Baseline temperature 0.07 (0.84) −0.002 (0.99)
Baseline white blood cells count 0.03 (0.77) −0.01 (0.92)
Baseline C-reactive protein 0.03 (0.79) 0.04 (0.74)
Baseline erythrocyte sedimentation rate −0.001 (0.99) −0.01 (0.97)
  1. a This result indicates that the higher the antibody titers, the higher the probability that a culture is positive in the 56.4% of the total patient population who had positive Brucella culture at baseline
  2. b This result indicates that the complicated brucellosis was associated with lower antibody titers at baseline. This result should be carefully interpreted given the low correlation coefficient