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Likelihood Ratio (LR) Test Calculator

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

Related Calculators


Goodness of Diagnostic Test Calculation

Enter the values in I or II:

I.Enter the information in the table with appropriate values
Disease presentDisease absentTotal
Test positive
Test negative
Total

II.Enter the following details
Enter the value of sensitivity
Enter the value of specificity

Positive Likelihood Ratio
Negative Likelihood Ratio

  
   
  
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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.