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Diagnostic Sensitivity
Definition 1
The probability that a test will produce a true postive result when used on effected subjects as compared to a reference or "gold standard". The sensitivity of a test can be determined by calculating: number of true positive results divided by the sum of true positive results plus number of false negative results. (NCI Thesaurus)
Definition 2
The frequency with which a test yields a true positive result among individuals who actually have the disease or the gene mutation in question. A test with high sensitivity has a low false-negative rate and thus does a good job of correctly identifying affected individuals. (NCI Dictionary)
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