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Table 3 Contingency table with results of all buffy coat samples tested in the PCR, Clinical signs and gram stain; and diagnostic accuracy of clinical observation with PCR

From: Epidemiology of epizootic lymphangitis of carthorses in northern Ethiopia using conventional diagnostic methods and nested polymerase chain reaction

  Type of diagnostic tests
Clinical observation(N=191) Gram stain(N=32)
pos neg pos neg
PCR
Pos 62 22 29 1
Neg 8 99 1 1
Sensitivity 73.81% 96.67
Specificity 92.52 % 50
Accuracy AUC 0.832 0.733
95% CI 0. 768-0. 895 0.283-1
p <0.001 0.028
Agreement k 0.675 0.467
95% CI 0.570-0.78 -0.160 - 1.000
p <0.001 0.008
  1. AUC area under rock curve, CI confidence interval, pos positive, neg negative, N number of tested samples