Chapter 29: QA Flashcards
1
Q
sensitivity
A
ability of a test to detect disease
2
Q
calculation for sensitivity
A
of true positive tests / # of all positive diagnoses
A / A+C
3
Q
Specificity
A
ability of a test to identify normalcy
4
Q
calculation for specificity
A
of true negatives / # of all negative diagnoses
D / D+B
5
Q
Positive predictive value (PPV)
A
how often is a positive study correct
6
Q
PPV equation
A
# of true positive tests / # of all positive noninvasive studies true positives + false positives
A / A+B
7
Q
Negative predictive value (NPV)
A
how often a negative study is correct
8
Q
NPV equation
A
# of true negative tests / # of all negative noninvasive studies True negatives + false negatives D / C+D
9
Q
Accuracy
A
how good a test is
10
Q
accuracy equation
A
total # of correct tests / total # of all studies
A+D / A+B+C+D
