Description
Return risk-set membership before or after exit events.
Biostatistical terms depend on a declared observation unit, exposure denominator, event order and sampling design. A risk-set flag, paired discordance contribution or support-weight ratio can be computed locally without fitting a survival model, establishing a treatment effect or validating an inferential analysis.
Return risk-set membership before or after exit events.
When to use this tool
Use Censored Event Riskset Flag when checking the stated exposure, event, matched-pair or cluster-support convention.
How to use the tool and how it works
- Enter entry, exit, eventAtExit, evaluationTime, evaluateBeforeEvents. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read inRiskSet, eventAtEvaluation. Inspect inRiskSet, eventAtEvaluation before interpreting the associated values.
Return risk-set membership before or after exit events. Require exit >= entry; inRiskSet includes entry and includes exit only when evaluateBeforeEvents, eventAtEvaluation independently tests eventAtExit and equality to exit.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| entry | Entry | Required. Finite number. |
| exit | Exit | Required. Finite number. |
| eventAtExit | Event At Exit | Required. Boolean. |
| evaluationTime | Evaluation Time | Required. Finite number. |
| evaluateBeforeEvents | Evaluate Before Events | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| inRiskSet | In Risk Set | Required. Boolean. |
| eventAtEvaluation | Supplied event-at-exit and exact evaluation/exit equality; independent of inRiskSet. | Required. Boolean. |
{
"input": {
"entry": 0,
"exit": 10,
"eventAtExit": true,
"evaluationTime": 10,
"evaluateBeforeEvents": true
},
"output": {
"inRiskSet": true,
"eventAtEvaluation": true
}
}Limitations and assumptions
- An exit event flag can be true while post-event risk membership is false; no complete event history or censoring assumptions are verified.
- 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
Analyze complete verified data with a method appropriate to the design and censoring assumptions; assess uncertainty and consult qualified statistical and clinical professionals for health conclusions.
References
Similar or alternative tools
- At Risk Window Entry Gap
Return overlap exposure with a supplied at-risk window.
- Risk Set Left Entry Equality Flag
Check event-time inclusion in a supplied risk interval.