Gold Standard Ambiguity
Sometimes "Gold Standard test" refers to the best performing test available. In these cases, there is no other criterion against which it can be compared and it is equivalent to a definition. When referring to this meaning, gold standard tests are normally not performed at all. This is because the "gold standard" test may be difficult to perform or may be impossible to perform on a living person (i.e. the test is performed as part of an autopsy or may take too long for the results of the test to be available to be clinically useful).
Other times, "Gold standard" does not refer to the best performing test available, but the best available under reasonable conditions. For example, in this sense, a MRI is the gold standard for brain tumour diagnosis, though it is not as good as a biopsy. In this case the sensitivity and specifity of the gold standard are not 100% and it is said to be an "imperfect gold standard" or "Alloyed gold standard"
Read more about this topic: Gold Standard (test)
Famous quotes containing the words gold, standard and/or ambiguity:
“The fifth day of Christmas,
My true love sent to me
Five gold rings,”
—Unknown. The Twelve Days of Christmas (l. 19–21)
“Liberty requires opportunity to make a living—a living decent according to the standard of the time, a living which gives a man not only enough to live by, but something to live for.”
—Franklin D. Roosevelt (1882–1945)
“Unlike the ambiguity of life, the ambiguity of language does reach a limit.”
—Mason Cooley (b. 1927)