Research Workbench

Restricted mean survival area

Integrate a Kaplan–Meier curve up to a prespecified supported horizon.

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First line horizon; remaining lines time,event 0/1

Choose a positive horizon no later than the maximum observed time. Supply at least two synthetic right-censored records with a common start and positive times.

The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.

Calculation results

Restricted mean survival time: 3.1333333
Horizon: 4
At risk at horizon: 2

How to interpret the output

RMST is the area under the Kaplan–Meier survival curve from zero to the horizon, in time units. The horizon should be prespecified and clinically meaningful; the maximum follow-up bound alone does not guarantee adequate tail support. This is a single-group point estimate without an SE or group comparison.

Method reference

Source checked 2026-11-06. Read the reproducible calculator validation report.