Once a laboratory test or diagnostic test result result is r…
Once a laboratory test or diagnostic test result result is received, the clinician will use the likelihood ratio or positive predictive value of the test combined with the pretest probability to determine the post-test probability of a diagnosis. For example, you can ask yourself, “If a patient has a productive cough, shortness of breath and fever (pretest probability) and then a chest xray with focal infiltrates, what is the probability (post-test probability) that the patient has pneumonia?” This type of reasoning is know as what term?
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