Sun28November0628PM 14

Skin prick testing can be used to aid the diagnosis of allergy to neuromuscular blocking agents. There are however true negative, true positive, false positive and false negative results.

How can the sensitivity of these predictive tests be calculated?

(Please select 1 option)

True positives / (true positives + false positives)

True positives / (true positives + false negatives) Correct

True negatives / (true negatives + false negatives)

True positives + true negatives / total

True negatives / (true negatives + false positives)

Explanation

In medical testing the following terms are used:

True negative - the patient does not have the disease and the test is negative.

True positive - the patient has the disease and the test is positive.

False positive - the patient does not have the disease but the test is positive.

False negative - the patient has the disease but the test is negative.

The sensitivity of a predictive test = true positives / (true positives + false negatives).

The specificity of a test = true negatives / (false positives + true negatives).

The negative predictive value of a test is true negatives / (false negatives + true negatives).

Answer Statistics

1

25%

2

56%

3

9%

4

5%

5

8%

Times answered: 294