Description
Return event rates on a shared person-time base.
Clinical research distinguishes supplied protocol metadata, participant/event records, allocation bookkeeping and an analysis target. A local count, permission flag or denominator choice can help reconcile records without establishing valid consent, randomization, regulatory compliance or a reliable treatment-effect estimate.
Return event rates on a shared person-time base.
When to use this tool
Use Trial Comparator Exposure Time Normalizer when checking the stated clinical-research record, allocation, timing, analysis or evidence-basis convention.
How to use the tool and how it works
- Enter activeEvents, comparatorEvents, activePersonTime, comparatorPersonTime, referenceBase. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read activeRate, comparatorRate, rateDifference, rateRatio. Use the output convention below.
Return event rates on a shared person-time base. Require nonnegative whole activeEvents, comparatorEvents >= 1 and positive person-times/referenceBase; rates = events*base/time, difference subtracts, ratio = activeEvents*comparatorTime/(comparatorEvents*activeTime).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| activeEvents | Active Events | Required. Safe integer; minimum 0. |
| comparatorEvents | Comparator Events | Required. Safe integer; minimum 1. |
| activePersonTime | Active Person Time | Required. Finite number; strictly above 0. |
| comparatorPersonTime | Comparator Person Time | Required. Finite number; strictly above 0. |
| referenceBase | Positive reporting person-time base in the same time units as both exposure inputs. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| activeRate | Active Rate | Required. Finite number. |
| comparatorRate | Comparator Rate | Required. Finite number. |
| rateDifference | Rate Difference | Required. Finite number. |
| rateRatio | Rate Ratio | Required. Finite number. |
{
"input": {
"activeEvents": 10,
"comparatorEvents": 20,
"activePersonTime": 100,
"comparatorPersonTime": 400,
"referenceBase": 100
},
"output": {
"activeRate": 10,
"comparatorRate": 5,
"rateDifference": 5,
"rateRatio": 2
}
}Limitations and assumptions
- Person-time units must match; no confounding adjustment, confidence interval, causal treatment effect or clinical recommendation is provided.
- 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 complete approved protocol, authenticated source records and qualified clinical/statistical oversight for actual trial design, conduct and interpretation.
References
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