Description
Propagate supplied absolute calendar-day birth bounds without approximating months or developmental age.
Pediatric research records use chronological age, visit windows, measurement resolution, task observations, and caregiver reports. Missing observation differs from noncompletion, and a completeness share depends on its denominator. Arithmetic on supplied records is separate from a developmental or clinical assessment.
Propagate supplied absolute calendar-day birth bounds without approximating months or developmental age.
When to use this tool
Use Child Age Calendar Partial Interval when you need this age, observation, visit, measurement, or record-completeness calculation with supplied inputs.
How to use the tool and how it works
- Enter observationDay, birthEarliestDay, birthLatestDay. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read ageLowerDays, ageUpperDays. Use the output convention below.
Require birthEarliestDay<=birthLatestDay<=observationDay and return ageLowerDays=observationDay-birthLatestDay and ageUpperDays=observationDay-birthEarliestDay.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observationDay | Observation Day | Required. Safe integer. |
| birthEarliestDay | Birth Earliest Day | Required. Safe integer. |
| birthLatestDay | Birth Latest Day | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| ageLowerDays | Age Lower Days | Required. Safe integer. |
| ageUpperDays | Age Upper Days | Required. Safe integer. |
{
"input": {
"observationDay": 1000,
"birthEarliestDay": 900,
"birthLatestDay": 910
},
"output": {
"ageLowerDays": 90,
"ageUpperDays": 100
}
}Limitations and assumptions
- Inputs are integer day coordinates on one calendar basis, not partially specified date strings. Bounds reflect only supplied birth-date uncertainty, without gestational correction, probability weights, or clinical interpretation.
- 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. Signed zero is exported as zero.
Alternative or Complementary methods
Use verified dates, measurement protocols, and observation definitions for the intended research question. A clinical interpretation needs the relevant age-specific assessment and context beyond the arithmetic record check.
References
Similar or alternative tools
- Research Age Anchor Gap
Compare supplied civil-date research age with an explicit day anchor; no age-category or care rule.
- Pediatric Research Followup Age Window Gap
For nonnegative integer ageAtBaselineDays and elapsedDays and ordered nonnegative minimumAgeDays and maximumAgeDays return ageAtVisitDays=baseline+elapsed, minimumMargin=age-minimum, maximumMargin=maximum-age, and inside on both inclusive bounds.