Description
Return endEarliest-birthLatest and endLatest-birthEarliest as duration bounds.
Longitudinal ageing research links observations to people, waves, and sources. A person may appear in multiple records, so distinct-person coverage and record counts answer different questions and require explicit duplicate rules.
Return endEarliest-birthLatest and endLatest-birthEarliest as duration bounds.
When to use this tool
Use Longevity Date Precision Interval when you need a record-coverage or source-support diagnostic in ageing research.
How to use the tool and how it works
- Enter birthEarliest, birthLatest, endEarliest, endLatest. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read minimumDays, maximumDays. Use the output convention below.
Require ordered birth and end intervals with earliest end at least latest birth. Return endEarliest-birthLatest and endLatest-birthEarliest as duration bounds.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| birthEarliest | Birth Earliest | Required. Safe integer. |
| birthLatest | Birth Latest | Required. Safe integer. |
| endEarliest | End Earliest | Required. Safe integer. |
| endLatest | End Latest | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| minimumDays | Minimum Days | Required. Safe integer. |
| maximumDays | Maximum Days | Required. Safe integer. |
{
"input": {
"birthEarliest": 10,
"birthLatest": 20,
"endEarliest": 100,
"endLatest": 110
},
"output": {
"minimumDays": 80,
"maximumDays": 100
}
}Limitations and assumptions
- Coordinates use one day basis and describe possible extrema, not a probability interval; actual dates, source independence, longevity, and clinical meaning are not established.
- 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
Review the original study design, identifiers, and missing-data definitions. Use the full longitudinal dataset for inference rather than treating a local coverage flag as evidence of representativeness.
References
Similar or alternative tools
- Longevity Record Age Interval Width
Return observation minus each endpoint for minimum and maximum age days and divide by positive daysPerYear for age years.
- Centenarian Age Document Date Gap
Return both age durations and documentedBirthDay-claimedBirthDay as discrepancyDays.