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Table 6.

Comparison of diagnosis results for CPV-2 and CCoV from RDT with PCR and RT-PCR

CPV-2/CCoV PCR/RT-PCR Total
Positive Negative
RDT
Positive 45 0 45
Negative 5 50 55
Total 50 50 100

Abbreviations: CPV-2, canine parvovirus type 2; CCoV, canine coronavirus; PCR, polymerase chain reaction; RT-PCR, reverse-transcription polymerase chain reaction; RDT, rapid diagnostic test.

Sensitivity (%)=45/(45+5)×100=45/50×100=90.0

Specificity (%)=50/(0+50)×100=50/50×100=100.0

Negative likelihood ratio = probability of negative test in those with disease probability of negative test in those without disease = 1 sensitivity specificity = 1 0.9 / 1 = 0.1 / 1 = 0.1

Positive likelihood ratio = probability of positive test in those with disease probability of positive test in those without disease = sensitivity 1 specificity = 0.9 / 1 1

Korean J Clin Lab Sci 2023;55:45-51 https://doi.org/10.15324/kjcls.2023.55.1.45
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