Survival risk-set reconciliation worksheet
StatMedAnalysis | Verified 2026-11-04

Instructions: Save a copy, replace blanks, and retain the completed version with your analysis plan. Use synthetic examples or approved aggregate counts only; do not add patient identifiers. Record unresolved decisions rather than inventing answers. This worksheet documents decisions and does not provide clinical advice.

Project/version: __________ Date: __________ Prepared by: __________

1. DEFINE THE TIME SCALE
Time origin, units, event definition: ____________________
Censoring definition and reason independence is plausible: _____________
Delayed-entry rule and truncation assumptions: ____________________
Tie convention: events before censoring; entrants after row (or document different convention).
Only use exact ordered times, not broad interval totals, for product-limit reconstruction.

2. ENTER AGGREGATE ROWS IN ORDER
Time | at risk n | events d | censored c | entrants after row e | next n-d-c+e | survival
____ | _________ | ________ | __________ | ____________________ | ____________ | ________
____ | _________ | ________ | __________ | ____________________ | ____________ | ________
____ | _________ | ________ | __________ | ____________________ | ____________ | ________
Starting survival=1. Multiply by (1-d/n) at each nonempty risk set.
Include censor-only and entry-only times where needed. Confirm each next risk count matches the following row.

3. RECONCILE AND QUALIFY
Discrepant rows and correction source: ____________________
Unobserved times or ambiguity that prevents reconstruction: ____________
Competing events and intended estimand: ____________________
Do not call 1-Kaplan-Meier the cumulative incidence of one competing event.
Source analysis version and reviewer checks: ____________________

Final review
Arithmetic checked by/process: __________ Date: __________
Unresolved limitations and next action: ____________________
Guide: https://www.statmedanalysis.com/blog/survival-risk-set-audit