A New Test Is Devised to Detect HIV

A new test is devised to detect HIV.  It has a sensitivity of 90% and specificity of 85% compared to the gold standard.  The test is used in 2 populations: a population in Africa with a 20% prevalence of HIV, and a population in Asia with a 1% prevalence of HIV.  Which of the following is the most accurate statement concerning the new test?

A) The negative predictive value of the test is lower in the Asian population
B) The positive predictive value of the test is higher in the African population
C) The sensitivity of the test is higher in the African population
D) The specificity of the test is higher in the Asian population
E) The test is not valid in the African population

Correct Answer:

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