Description
Optionally add nonreporting population to denominator, then divide cases by that base.
Epidemiological shares depend on who or what enters each denominator. Tests, distinct people, known-status records and eligible contacts describe different populations; a ratio computed from them is not automatically population risk or an individual diagnosis.
Optionally add nonreporting population to denominator, then divide cases by that base.
When to use this tool
Use Surveillance Nonreporting Base Flag when you need a stated surveillance or screening count summary.
How to use the tool and how it works
- Enter cases, reportingPopulation, nonreportingPopulation, includeNonreporting. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read denominator, rate. Use the output convention below.
Require nonnegative integer cases, positive reporting population and nonnegative nonreporting population. Optionally add nonreporting population to denominator, then divide cases by that base.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| cases | Cases | Required. Safe integer; minimum 0. |
| reportingPopulation | Reporting Population | Required. Finite number; strictly above 0. |
| nonreportingPopulation | Nonreporting Population | Required. Finite number; minimum 0. |
| includeNonreporting | Include Nonreporting | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| denominator | Denominator | Required. Finite number. |
| rate | Supplied rate on the period and denominator basis stated above. | Required. Finite number. |
{
"input": {
"cases": 10,
"reportingPopulation": 1000,
"nonreportingPopulation": 500,
"includeNonreporting": false
},
"output": {
"denominator": 1000,
"rate": 0.01
}
}Limitations and assumptions
- The rate is cases per population unit without an automatic 100000 multiplier. Cases from nonreporting areas are not added and no missing-case correction or incidence period is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the appropriate study design and verified case definitions for health interpretation. Address ascertainment, repeated records, missing status, selection and uncertainty before generalizing a descriptive proportion.
References
Similar or alternative tools
- Vaccination Coverage Known Status Base
Return vaccinated/known and vaccinated/all-records coverage.
- Test Positivity Repeated Person Exclusion
Count records or distinct people, with positive under any test or the first input occurrence as chosen.