Description
Compare an onset date with a supplied case-definition revision boundary.
Epidemiological reporting depends on case-definition versions, observation windows, censoring, person/test denominators and time-bin boundaries. Missing and indeterminate results differ, while multiple tests can belong to one person. Local record arithmetic does not diagnose infection, establish transmission or select a public-health rule.
Compare an onset date with a supplied case-definition revision boundary.
When to use this tool
Use Case Definition Revision Onset Boundary when checking the stated benign surveillance record, time, exposure or denominator convention.
How to use the tool and how it works
- Enter onsetDate, revisionBoundaryDate, boundaryUsesNew. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read useNewDefinition. Inspect useNewDefinition before interpreting the associated values.
Parse real onset/revision-boundary YYYY-MM-DD dates. useNewDefinition means onset>boundary, adding equality only when boundaryUsesNew=true.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| onsetDate | Onset Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| revisionBoundaryDate | Revision Boundary Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| boundaryUsesNew | Boundary Uses New | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| useNewDefinition | Use New Definition | Required. Boolean. |
{
"input": {
"onsetDate": "2026-11-01",
"revisionBoundaryDate": "2026-11-01",
"boundaryUsesNew": true
},
"output": {
"useNewDefinition": true
}
}Limitations and assumptions
- This selects a supplied temporal branch; no case definition is loaded or applied and current public-health reporting rules are not determined.
- 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.
Alternative or Complementary methods
Use verified source records, current authoritative definitions and appropriate complete epidemiological/statistical methods with qualified public-health interpretation for actual decisions.
References
Similar or alternative tools
- Research Contact Date Redaction Shift
Shift a research contact date by a supplied signed number of calendar days.
- Case Component Match Count Tool
Count explicit known case-component matches without determining a clinical case definition.