Two nurse practitioners want to investigate a new laboratory test that identifie

Question

Two nurse practitioners want to investigate a new laboratory test that identifies steptococcal infections. Katie Kidd, FNP uses the standard culture test, which has a sensitivity of 90% and a specificity of 96%. Charlie Childs, FNP uses the new test, which has a 96% sensitivity and a specificity of 96%. If 200 patients undergo culture with both test, which of the following is correct. Select one: a. FNP Kidd will correctly identify more children with strep throat than FNP Childs b. FNP Kidd will correctly identify less children with strep throat than FNP Childs C. FNP Kidd with correctly identify more children without strep throat than FNP Childs d. The prevalence of streptococcal infection is needed to determine which nurse practitioner is correct

Explanation / Answer

Test sensitivity is defined as the ability or the probability to correctly identify the person having a disease or some characteristic or condition.

Test specificity is defined as the ability or the probability of correctly identify the person not having a disease or some characteristic or condition.

Now for the 2 tests, we are given that:

Now as the sensitivity for the new test is greater, the FNP kidd test will correctly identify less children with the strep throat than the FNP childs. ( because of lower sensitivity of the FNP kidd test )

Therefore b is the correct answer here

Katie Kidd Standard Culture Test Charlie Childs New Test Sensitivity 90% 96% Specificity 96% 96%

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