Epi #6 Flashcards
1
Q
Sensitivity
A
TP/ TP+FN
2
Q
Specificity
A
TN/TN+FP
3
Q
PPV
A
chance that a person who tests positive is actually positive
TP/TP+FP
4
Q
TNPV
A
chance that a person who tests negative is actually negative
TN/TN+FN
5
Q
what happens to PPV as prevalence goes down
A
gets worse
6
Q
relationship between sensitivy and specificity to PPV and NPV
A
seNsitivity inversely associated with false Negative rate
sPecificity inversely associated with false Positive rate
7
Q
what does a test need to rule out a diagnosis
A
sensitivity - SnNout - sensitive test plus negative result rules out
8
Q
what does a test need to rule in a diagnosis
A
specificity - SpPin - specific test plus positive result rules in
