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Likelihood Ratios are a means of expressing the performance of diagnostic tests. They allow health care providers to estimate the odds of disease given the results of test information (history items, physical exam, lab or radiologic tests) and some knowledge of the baseline (or pre-test) odds of disease.

How to Calculate and Use Likelihood Ratios (from CEBM: Centre for Evidence Based Medicine)

Search for Likelihood Ratios by Disease

Search for Likelihood Ratios by Test

E-mail us to submit comments or additional likelihood ratios

Disclaimer: We make no guarantee as to the accuracy of the test information provided or to whether it represents the most recent or highest quality data for a given topic. Please use the references to critically appraise the data used to calculate the LR values. This site is under construction: data without references are from Sox, et al Medical Decision Making, ©1988 Butterworth Heinemann and are used with permission.