Recent content by piglerdog

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    Performance of a test

    sorry i am mistaken. the disease is only confirmed only by using an invasive rarely done test. The 'one of a/b/c/d' is a selection of the available tests and having one of them makes the diagnosis only 'probable'. Therefore where the test being studied is negative, the disease is only...
  2. P

    Performance of a test

    i am trying to explain whether calculating the performance of a diagnostic test (Sens/spec) can be determined - if the reference 'gold' test for the disease is a composite containing the test in question. eg. the test is serum rhubard >0.5. and the disease is confirmed if one of a/b/c/d ( and...