Class 22: Quality Assurance Flashcards
1
Q
what do quality assurance statistics compare?
A
compares ultrasound with the gold standard
2
Q
5 quality assurance measurements
A
- sensitivity
- specificity
- PPV
- NPV
- accuracy
3
Q
what is sensitivity?
A
US is positive
GS is positive
4
Q
what is sensitivity?
A
US is negative
GS is negative
5
Q
what is PPV?
A
percent of patients who have:
US is +
GS is +
6
Q
what is NPV?
A
percent of patients who have:
US is -
GS is -
7
Q
what is accuracy?
A
percent of correct ultrasound dx (TP + TN)
8
Q
what is a true positive?
A
U/S & GS both are positive (disease is present)
9
Q
what is a true negative?
A
U/S & GS both are negative (disease is not present)
10
Q
what is a false positive?
A
US is positive
GS is negative
11
Q
what is a false negative?
A
US is negative
GS is positive
