P5 - Laboratory Assays Flashcards
1
Q
quantitative assays
A
reported as a specific numeric value
2
Q
semi-quantitative assays
A
reported in a category scale
3
Q
qualitative assays
A
- reported as negative or positive
- indicates the presence or absence of a sample
4
Q
accuracy
A
closeness of measured value to true value
5
Q
precision
A
ability to give similar results if analyzed several times
6
Q
reliability
A
to be both accurate and precise
7
Q
sensitivity
A
- testing positive if disease is truly present
- will have few false negatives
8
Q
specificity
A
- testing negative is disease is truly absent
- will have few false positives
9
Q
is specificity or sensitivity a good screening test
A
- sensitivity
10
Q
is specificity or sensitivity a good confirmatory test
A
- specificity
11
Q
positive predictive value (PPV)
A
- strongly suggests presence of that disease
12
Q
negative predictive value (NPV)
A
- strongly suggests absence of that disease
13
Q
test with a high PPV
A
- specificity
14
Q
test with a high NPV
A
- sensitivity
