How to use
- Choose whether you want to enter prevalence and detection rate or a direct detection yield.
- Enter percentages and decimal places, then calculate.
- Read detection yield first, then NNS.
Wave 13 clinical bridge
Detection yield → NNS
The share URL stores only mode and decimal settings.
Where this fits
Use this page when you want a people-needed interpretation for screening yield. NNH and ARR / NNT translate absolute risk gaps into people-needed language, while post-test odds focuses on belief updating after a result.
FAQ
What does this page calculate?
It converts a screening detection yield into number needed to screen and optionally derives that yield from prevalence and detection rate.
What is number needed to screen?
It is the number of people who need to be screened to detect one target case under the assumptions you entered.
Can I enter a direct yield?
Yes. Switch to direct yield mode when you already know the absolute detection yield per screened person.
Does the share URL include my rates?
No. The share URL stores only light settings such as mode and decimal places. Numeric inputs stay in your browser.