The CHN Can Enhance the Sensitivity and Specificity of a Test

Multiple Choice

The CHN can enhance the sensitivity and specificity of a test by using its predictive value. Which one of the following best defines positive predictive value?

A) The proportion of persons with a negative test who are actually disease-free
B) The variation inherent in the trait being measured
C) Any inconsistency in the testing instrument
D) The proportion of persons with a positive test who actually have the disease