What is the number one cause of death in the U.S. as of 2011??

In the context of diagnostic tests, what does "specificity" refer to?

A) The ability of a diagnostic test to detect only the medical condition in question B) The ability of a diagnostic test to detect the medical condition in question in every patient who has the condition C) The frequency of the condition in the population tested at a given time D) The quantity that tells the probability that a result from a diagnostic test is correct

A screening can serve as a substitute for a(n)

A) Nothing B) Assessment C) Referral D) Evaluation