Diagnostic tests Flashcards
1
Q
What is diagnostic sensitivity?
A
Frequency of test being correctly positive
= TP / TP + FN
2
Q
What is diagnostic specificity?
A
Frequency of test being correctly negative
= TN / TN + FP
3
Q
What is diagnostic accuracy?
A
Frequency of correct diagnosis
= TP + TN / TP +FP +TN + FN
4
Q
What is the predictive value of a positive test?
A
Liklihood of a positive test result meaning a correct diagnosis
= TP / TP +FP
5
Q
What is the predictive value of a negative test?
A
Liklihood of a negative test results meaning no disease
= TN / TN + FN
