Stratified common odds ratio
Combine stratum cross-products using Mantel–Haenszel weighting.
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Enter at least two disjoint strata. Each row is exposed cases, exposed noncases, unexposed cases, unexposed noncases. Zero cells are allowed if the combined denominator is positive. An odds ratio above 1 indicates higher case odds in the exposed group. Review stratum-specific associations separately; no heterogeneity test or interval is calculated.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Common odds ratio
- 4
- Number of strata
- 2
- Weighted numerator
- 4
- Weighted denominator
- 1
How to interpret the output
Compute sum(a d/n) divided by sum(b c/n). Strata must be disjoint and substantively appropriate. Examine stratum-specific effects before interpreting a common association. This is an uncorrected point estimate without a confidence interval.
Method reference