Sensitivity Specificity

Question 1

 Sensitivity:

Answer 1

proportion of people who test positive with the clinical test and the gold standard relative to all patients tested who test positive with the gold standard  percent positives that are correctly identified

Question 2

 Specificity:

Answer 2

proportion of people who test negative with the clinical test and the gold standard relative to all patients tested who test positive with the gold standard  percent negatives who are correctly identified

Question 3

 Positive predictive value:

Answer 3

proportion of people who truly have the condition relative to all patients who test positive

Question 4

 Negative predictive value:

Answer 4

proportion of people who truly do not have the condition relative to all patients who test negative