sick cat workshop Flashcards
What does SNNOUT mean
when high sensitive test is negative, the disease is ruled out
What does SPPIN mean
when highly specific test is positive it rules the disease in
What is positive predictive value
likelihood of having the disease when the test is positive. Directly related to prevalence. As the prevalence gets higher, PPV gets higher
What is negative predictive value
likelihood of not having the disease when test is negative. Inversely related to prevalence. As the prevalence gets higher, the NPV gets lower
what is the calculation to work out PPV
true positive/ (true positive + false positive)
what is the calculation to work out NPV
true negative/ (true negative + false negative)
what does a 100% sensitive test mean
no false negatives
snnout
what does a 100% specificity test mean
no false positives
SPPIN
define prevalence
proportion of individuals in the population who have a particular disease
List 2 advantages of FeLV/FIV testing
if true result, allows appropriate management
may enhance rehoming for neg cats
List 3 negatives of FeLV/FIV testing in shelters
undergoing blood test
false negatives
false positives