Direct rate standardization
Compare crude and directly standardized rates using explicit reference weights.
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Enter mutually exclusive strata as event count, exposure time and reference weight. Use the same exposure unit throughout; weights may be counts or proportions and are normalized to sum to one. At least one weight must be positive. Output rates are per one entered exposure unit, not percentages.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Standardized rate
- 0.0625
- Crude rate
- 0.066666667
- Sum of reference weights
- 4
How to interpret the output
Strata must be mutually exclusive, rates comparable and weights drawn from the same reference population for every comparison. The output is events per exposure unit. Reference weights are normalized internally.
Method reference