資料を置いときます。
英語版Wikipedia、「Gold standard (test)」より。
ttp://en.wikipedia.org/wiki/Gold_standard_(test)
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A hypothetical ideal "gold standard" test has a sensitivity of 100% with respect to the presence of the disease (it identifies all individuals with a well defined disease process; it does not have any false-negative results) and a specificity of 100% (it does not falsely identify someone with a condition that does not have the condition; it does not have any false-positive results). In practice, there are sometimes no true "gold standard" tests. Sometimes they are called "perfect" and "alloyed" gold standard.
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