Description
Return a supplied prematurity correction and resulting age.
Chronological, corrected and age-equivalent values use different anchors and assumptions. Arithmetic can compare supplied age coordinates, but a clinical correction or interpretation of developmental delay is not determined by subtraction alone.
Return a supplied prematurity correction and resulting age.
When to use this tool
Use Developmental Study Corrected Age Anchor when checking a supplied research age anchor or offset.
How to use the tool and how it works
- Enter chronologicalDays, gestationalDays, fullTermDays. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read prematurityDays, correctedDays. Use the output convention below.
Return a supplied prematurity correction and resulting age. Require nonnegative whole chronologicalDays and positive whole gestationalDays/fullTermDays; prematurityDays = max(0,fullTerm-gestational), correctedDays = chronological-prematurity.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| chronologicalDays | Chronological Days | Required. Safe integer; minimum 0. |
| gestationalDays | Gestational Days | Required. Safe integer; minimum 1. |
| fullTermDays | Full Term Days | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| prematurityDays | max(0,fullTermDays-gestationalDays). | Required. Safe integer. |
| correctedDays | chronologicalDays-prematurityDays; may be negative, without a clinical correction policy. | Required. Safe integer. |
{
"input": {
"chronologicalDays": 180,
"gestationalDays": 238,
"fullTermDays": 280
},
"output": {
"prematurityDays": 42,
"correctedDays": 138
}
}Limitations and assumptions
- Corrected age may be negative; full-term reference and clinical applicability are not selected.
- 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
Use the appropriate professional guidance and validated assessment before interpreting corrected or age-equivalent values for an individual.
References
Similar or alternative tools
- Infancy Age Anchor Correction Gap
Compare age under two supplied birth anchors.
- Longitudinal Study Age Wave Offset
Return age at a supplied longitudinal wave and its target offset.