Calculations Flashcards
1
Q
Sensitivity
A
P(T+|D+)
A/A+C
2
Q
Specificity
A
P(T-|D-)
D/B+D
3
Q
False Negative Rate
A
P(T-|D+)
C/A+C
1-SENSitivity
4
Q
False Positive Rate
A
P(T+|D-)
B/B+D
1-SPECificity
5
Q
Prevalence
A
P(D+)
A+C/Sum
6
Q
Positive likelihood ratio
A
P(T+|D+)/P(T+|D-)
((A/A+C) / (B/B+D))
Sensitivity / 1-specificity
Sensitivity / 1- FPR
7
Q
Negative likelihood ratio
A
P(T-|D+)/P(T-|D-)
((C/A+C) / (D/B+D))
1-Sensitivity / specificity
False negative Rate/True negative Rate
8
Q
Diagnostic Accuracy
A
A+D / sum
9
Q
PPV
A
P(D+|T+)
A/A+B
10
Q
NPV
A
P(D-|T-)
D/C+D
11
Q
Relative Risk Reduction
A
1-{(A/A+B) / (C/C+D)} * 100
12
Q
Absolute Risk Reduction
A
(C/C+D - A/A+B) * 100
13
Q
NNT
A
1/ARR
