Post Test Probability Calculator

Enter the pre-test probability and the likelihood ratio into the calculator to determine the post-test probability.

Post-Test Probability Formula

The following equation is used to calculate the post-test probability.

Pre Test Odds = P/(1 – P) = 0.012

Post Test Odds = Pre Test Odds * LR

Post Test Probability = Post Test Odds/(1 + Post Test Odds)

  • Where P is the pre-test probability
  • LR is the likelihood ratio

FAQ

What is post test probability?

A post test probability is the likelihood for an event to occur given a starting pre test probability, and pre-test odds.

post test probability calculator

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