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Table 5 Cohen’s kappa (κ) coefficient with 95% of CIs to assess the degree of agreement between molecular and serological techniques for the diagnosis of C. burnetii, C. abortus and Leptospira spp.

From: Neglected zoonotic agents in cattle abortion: tackling the difficult to grow bacteria

  C. burnetii C. abortus Leptospira spp.
Number of observed agreements 145 (79.67% of the observations) 103 (56.59% of the observations) 146 (80.22% of the observations)
Number of agreements expected by chance 140.7 (77.33% of the observations) 103.5 (56.85% of the observations) 139.0 (6.37% of the observations)
Kappa (κ) 0.103 ± 0.086 −0.006 ± 0.067 0.163 ± 0.074
95% CIs −0.065 to 0.272 −0.137 to 0.126 0.018 to 0.308
Strength of agreement Poor Poor Poor