When we do any test, we need to ask ourselves how reliable is the test in answering the question we are asking, and what are we going to do with the information. Tests are not magical correct answers to questions. All tests can be wrong: either a false positive where the test says you have the disease but you don’t. Or a false negative, where the test says you are fine but you really do have the disease. Even the best tests in the world are wrong between 1-5% of the time. That is for every 20-100 tests done, 1 of them is wrong. Then, when you get what is may be the right answer from a test, how is that going to change what needs to be done? 

Read the rest of entry »