Description
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.
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.
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.
When to use this tool
Use Pediatric Research Followup Age Window Gap 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 ageAtBaselineDays, elapsedDays, minimumAgeDays, maximumAgeDays. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read ageAtVisitDays, minimumMargin, maximumMargin, inside. Inspect inside before interpreting the associated values.
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.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| ageAtBaselineDays | Age At Baseline Days | Required. Safe integer; minimum 0. |
| elapsedDays | Elapsed Days | Required. Safe integer; minimum 0. |
| minimumAgeDays | Minimum Age Days | Required. Safe integer; minimum 0. |
| maximumAgeDays | Maximum Age Days | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| ageAtVisitDays | Age At Visit Days | Required. Safe integer. |
| minimumMargin | Minimum Margin | Required. Safe integer. |
| maximumMargin | Maximum Margin | Required. Safe integer. |
| inside | Inside | Required. Boolean. |
{
"input": {
"ageAtBaselineDays": 100,
"elapsedDays": 50,
"minimumAgeDays": 120,
"maximumAgeDays": 180
},
"output": {
"ageAtVisitDays": 150,
"minimumMargin": 30,
"maximumMargin": 30,
"inside": true
}
}Limitations and assumptions
- Ages use days and the allowed window is supplied rather than selected from clinical guidance. The check does not account for date uncertainty, gestational correction, developmental status, or patient eligibility beyond that arithmetic rule.
- 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.
- Caregiver Report Window Base Flag
Coverage bookkeeping for disjoint supplied direct, proxy-only and unknown reporting days.