Survival Risk-Set Reconciler
Reconcile ordered event, censoring and entry counts and audit product-limit survival steps.
Your entries stay in this page’s memory and are not submitted to us. Downloads are generated locally. Reloading or leaving the page clears your entries. Do not enter patient information.
Use fictional or aggregate values only. All defaults are hypothetical; calculation stays in your browser.
Calculation results
Final product-limit survival: 0.894118; next risk count: 80.
Row 1: next risk 85; factor 0.95; survival 0.95
Row 2: next risk 80; factor 0.941176; survival 0.894118
Assumptions and limits
Use up to 100 aggregate rows at ordered exact times, including censor-only and entry-only times as needed. Every count is a whole number from 0 to 100 million. At each time, events occur before censoring and new entries occur after that row; the next row must reconcile exactly. The product-limit step is 1−events/at-risk. A zero-risk row has no events and leaves the product unchanged. These conventions must match the source data; grouped interval totals cannot reconstruct Kaplan–Meier survival. Independent censoring and, for delayed entry, suitable truncation assumptions are needed for interpretation. This is an arithmetic audit, not a fitted survival analysis: no confidence intervals, competing-risk cumulative incidence or recurrent-event model. Never enter patient data.
R survival package: risk sets and product limits · Read the practical guide · Download blank worksheet (TXT)