How to use
- Choose whether you are starting from pre-test probability or prior odds.
- Enter the likelihood ratio and decimal places.
- Read prior odds, posterior odds, posterior probability, and the size of the update together.
Wave 11 diagnostic bridge
Prior odds → LR update → posterior odds
The share URL stores only mode and decimal settings.
Where this fits
Use this page when you want to see the odds step explicitly. Bayes theorem is the broader page. Pre/post-test probability is the probability-first page. Odds/probability converter is the smaller conversion-only bridge.
FAQ
What does this page calculate?
It starts from pre-test probability or prior odds, multiplies by a likelihood ratio, and reports posterior odds and posterior probability.
Why show post-test odds instead of only posterior probability?
Likelihood ratios multiply odds directly. Showing the odds step makes the Bayes update easier to audit, teach, and compare with diagnostic workflows.
Can I start from prior odds instead of probability?
Yes. You can enter either pre-test probability or prior odds. The page converts the missing form automatically and then applies the likelihood ratio.
Does the share URL include my numbers?
No. The share URL stores only light settings such as mode and decimal places. Numeric inputs stay in your browser.