Ratio and Difference of Event Risks
Compare observed shares of events between groups.
Your numbers
Ratio of observed risks
Association no prove cause. If reference proportion zero, the ratio no get defined value.
Compare scenarios
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Formula
Use RR = (a/n)/(b/m) and D = a/n−b/m. a and b na event counts for groups A and B; n and m na their totals. D na probability difference, wey result show for percentage points.
Compare observed shares of events between groups.
Example wey show the calculation
- Events for group A
- 20
- All people for group A
- 100
- Events for group B
- 10
- All people for group B
- 100
- Ratio of observed risks
- 2
- Difference between proportions
- 10 percentage-point difference
- Share of events for group A
- 20 %
- Share of events for group B
- 10 %
Where e fit work and limits
Association no prove cause. If reference proportion zero, the ratio no get defined value.
We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.
Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.
Version of di formula: d24faa6fc634 · Example don get check: