False/True Test Results Flashcards Preview

MSK I - Principles Of Dx And Tx > False/True Test Results > Flashcards

Flashcards in False/True Test Results Deck (15)
Loading flashcards...
1

Positive diagnostic (PT) test
Positive reference standard (MD) test

True + (TP)

2

Positive diagnostic (PT) test
Negative reference standard (MD) test

False + (FP)

3

Negative diagnostic (PT) test
Positive reference standard (MD test

False - (FN)

4

Negative diagnostic (PT) test
Negative reference standard (MD) test

True - (TN)

5

Total WITH condition

TP + FN

6

Total WITHOUT condition

FP + TN

7

Total who test POSITIVE

TP + FP

8

Total who test NEGATIVE

FN + TN

9

PPV = TP/(TP+FP)

Probability that someone with a + test will have the condition

10

NPV = TN/(TN+FN)

Probability that someone with a negative test will not have the condition

11

PLR = sensitivity/(1-specificity)

Increase in odds favoring the condition given a + test result (odds of having the condition)

12

NLR = (1-sensitivity)/specificity

Decrease in odds favoring the condition given a - result (odds of not having the condition)

13

What does LR stand for?

Likelihood ratio

14

What does SPin mean?

SPecific test to rule IN a hypothesis
- specific tests have very FEW FPs --> can count on a + test being a TP

15

What does a SNout mean?

SeNsitive test to rule OUT a hypothesis
- sensitive tests have very few FNs --> can count on a - test being a TN