# Likelihood Ratio (LR) Test Calculator

The likelihood ratio (LR) is a test that is performed to analyze the goodness of a diagnostic tests.

## Goodness of Diagnostic Test Calculation

Code to add this calci to your website

#### Formula:

Positive LR = (a/(a+c)) / (b/(b+d))
Negative LR = (c/(a+c)) / (d/(b+d))
Positive LR = (sensitivity)/(1-specificity)
Negative LR = (1-sensitivity)/(specificity)
Goodness of diagnostic test can be easily determined using this *likelihood ratio calculator.*

**Note :**This statistics calculator is presented for your own personal use and is to be used as a guide only. Medical and other decisions should NOT be based on the results of this calculator. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results.