Diagnostic Testing

Question 1

In regards to Diagnostic Testing, Sensitivity tests for _____

Answer 1

People who have the disease

Question 2

In regards to Diagnostic Testing, Specificity tests for ______

Answer 2

People who don’t have the disease

Question 3

Post-Test Probabilty (PPV) formula

Answer 3

TP/ (TP+FP)

Question 4

Three Diagnostic things needed to confirm disease (Ex: Lyme)

Answer 4

1. Sensitivity
2. Specificity
3. Pre-Test Prob

Question 5

Likelihood ratio for positive test

Answer 5

(+ result) with disease/(+ result without disease)

“Sensitivity/(1-Specificity)” because normally specificity wants to find a negative result.

Question 6

Likelihood ratio for negative tiest

Answer 6

(- result) with disease/ (- result) without disease

“(1-Sense)/Spec” because normally sensitivity wants to find positive result