Flashcards in Assessment of Diagnostic Techniques Deck (5)
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
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
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.
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.