Description
Return eventLower-anchorUpper and eventUpper-anchorLower as possible offset bounds.
Menstrual and visit records can contain uncertain onsets, partial observation windows, and supplied day origins. A bounded interval calculation describes those records without predicting fertility or establishing a normal clinical pattern.
Return eventLower-anchorUpper and eventUpper-anchorLower as possible offset bounds.
When to use this tool
Use Gynecology Recall Anchor Bound when you need one explicit day-coordinate or uncertainty-bound component.
How to use the tool and how it works
- Enter eventLower, eventUpper, anchorLower, anchorUpper. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read offsetLower, offsetUpper. Use the output convention below.
Require ordered event and anchor intervals. Return eventLower-anchorUpper and eventUpper-anchorLower as possible offset bounds.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| eventLower | Event Lower | Required. Finite number. |
| eventUpper | Event Upper | Required. Finite number. |
| anchorLower | Anchor Lower | Required. Finite number. |
| anchorUpper | Anchor Upper | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| offsetLower | Offset Lower | Required. Finite number. |
| offsetUpper | Offset Upper | Required. Finite number. |
{
"input": {
"eventLower": 20,
"eventUpper": 22,
"anchorLower": 5,
"anchorUpper": 8
},
"output": {
"offsetLower": 12,
"offsetUpper": 17
}
}Limitations and assumptions
- Coordinates share a day or time basis; the bounds do not imply independent probabilities, actual recall accuracy, cycle phase, or a 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. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Preserve uncertainty and consult an appropriate health professional for symptoms, clinical interpretation, or care scheduling.
References
Similar or alternative tools
- Menstrual Diary Cycle Length One Pair
Return onset difference and that difference minus or plus the sum of uncertainties.
- Cycle Record Left Censored Interval Tag
Return first-onset-minus-observation-start as minimumDays and exact prior-to-first difference only when known, otherwise exactDays zero with exactPresent false.