Description
Return both age durations and documentedBirthDay-claimedBirthDay as discrepancyDays.
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 both age durations and documentedBirthDay-claimedBirthDay as discrepancyDays.
When to use this tool
Use Centenarian Age Document Date Gap when you need a record-coverage or source-support diagnostic in ageing research.
How to use the tool and how it works
- Enter claimedBirthDay, documentedBirthDay, observationDay. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read claimedAgeDays, documentedAgeDays, discrepancyDays. Use the output convention below.
Require observationDay no earlier than either claimed or documented birth day. Return both age durations and documentedBirthDay-claimedBirthDay as discrepancyDays.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| claimedBirthDay | Claimed Birth Day | Required. Safe integer. |
| documentedBirthDay | Documented Birth Day | Required. Safe integer. |
| observationDay | Observation Day | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| claimedAgeDays | Claimed Age Days | Required. Safe integer. |
| documentedAgeDays | Documented Age Days | Required. Safe integer. |
| discrepancyDays | Discrepancy Days | Required. Safe integer. |
{
"input": {
"claimedBirthDay": 100,
"documentedBirthDay": 130,
"observationDay": 36630
},
"output": {
"claimedAgeDays": 36530,
"documentedAgeDays": 36500,
"discrepancyDays": 30
}
}Limitations and assumptions
- Day coordinates and document status are supplied; the discrepancy does not authenticate records, validate centenarian status, or establish a clinical fact.
- 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.
- Longevity Date Precision Interval
Return endEarliest-birthLatest and endLatest-birthEarliest as duration bounds.