Kaplan–Meier Survival & Log-rank
Censoring-aware survival · median · risk table · log-rank
Kaplan–Meier Survival & Log-rank
Censoring-aware survival · median · risk table · log-rank
Calculated locally in this browserColumn order: subject_id, group, time, event_1_censored_0
Editable data table
| subject_id | group | time | event_1_censored_0 | |
|---|---|---|---|---|
Paste CSV / TSV
Analysis result
| Group | N | Events | Censored | Median survival | Final survival |
|---|---|---|---|---|---|
| Control | 4 | 3 | 1 | 10 | 0.25 |
| Treatment | 4 | 2 | 2 | 20 | 0 |
⚠ Kaplan–Meier and log-rank assume non-informative censoring; inspect censoring patterns and prespecified endpoints.
Data requirements
Enter subject ID, group, non-negative time and event status (1=event, 0=censored).
subject_id, group, time, event_1_censored_0Review before reporting
Research use only. Validate raw data, exclusions and interpretation against the approved analysis plan.
Check raw observations, excluded rows, model assumptions and study-specific acceptance criteria before using the result.
Transparent analysis
Inputs are processed locally in your browser. Review the calculation policy, limitations and verification approach before reporting a result.
Read the methodology →EVIDENCE & REVIEW
A result you can audit.
Reviewed 12 August 2026Censoring and risk-set logic review complete
Implementation check
The analysis keeps event status explicit, orders event times and displays group curves with at-risk context rather than reducing the data to a single median.
Interpretation boundary
Kaplan-Meier estimates rely on defensible time origins and censoring assumptions. Small risk sets and late-tail estimates should be interpreted cautiously; clinical decisions require validated statistical workflows.
Method references
Methods to Analyse Time-to-Event Data: The Kaplan-Meier Survival CurveIndian Journal of Anaesthesia / PMCKaplan-Meier estimation, censoring and comparison context.
Survival analysis: Part I — analysis of time-to-eventBritish Journal of Cancer / PMCInterpretation of survival functions, censoring and common limitations.
Source-informed and internally checked; independent scientific or regulatory validation is not claimed. Research use only.