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Clinical Epidemiology 

Clinical Epidemiology
Chapter:
Clinical Epidemiology
Author(s):

Scott C. Litin

and John B. Bundrick

DOI:
10.1093/med/9780190464868.003.0024
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date: 19 October 2019

Diagnostic tests are tools that either increase or decrease the likelihood of disease. The sensitivity, specificity, and predictive values of normal and abnormal test results can be calculated with even a limited amount of information. Some physicians prefer interpreting diagnostic test results by using the likelihood ratio. This ratio takes properties of a diagnostic test (sensitivity and specificity) and makes them more helpful in clinical decision making. It helps the clinician determine the probability of disease in a specific patient after a diagnostic test has been performed.

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