How to use
- Enter event and non-event counts for group A and group B.
- Choose the confidence level and decimal places.
- Read the odds ratio, interval, and warnings before moving to broader RR versus OR comparison pages.
Wave 29 statistics entry
Add interval context to one odds ratio
The share URL stores only confidence and decimal settings.
How to choose between nearby pages
Use odds ratio from table when the point estimate alone is enough. Use this page when the same 2x2 table now needs interval context. Move to relative risk and odds ratio if you need RR and OR on one screen instead of only OR plus interval.
FAQ
What does this page calculate?
It reads the odds ratio from one 2x2 table and adds a confidence interval at 90%, 95%, or 99%.
How is this different from the quick odds ratio page?
The quick odds ratio page is the shortest route to the point estimate only. This page keeps the same 2x2 table input but adds confidence-interval context.
Does a zero cell break the interval?
No. When a cell is zero, the interval uses the standard 0.5 continuity correction so the interval can still be displayed.
Does the share URL include my counts?
No. The share URL stores only light settings such as decimal places and confidence level. Your counts stay in your browser.