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Flashcards in Assessment of Diagnostic Techniques Deck (5)
1

What is the equation for diagnostic sensitivity?

#true positives / #true positives + #false negatives

i.e. how many animals with disease does the test pick up on

2

What is the equation for diagnostic accuracy?

#true positives + #true negatives / total # of animals

i.e. how many animals does the test correctly categorise as having/not having disease

3

What is the equation for diagnostic specificity?

#true negatives / #true negatives + #false positives

i.e. how many animals without disease does the test correctly identify.

4

What do predictive values of positive/negative results indicate?

These predict how likely a positive/negative result of a test is to be truly positive/negative.

5

What is the equation for the predictive value of a positive result?

#TP / #TP + #FP