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sci.Kaplan-Meier-survival Calculator
Calculates the Kaplan-Meier survival probability at each event time and plots the step-function survival curve with censoring marks. Median survival is the time when S(t) crosses 0.5 — log-rank test compares survival curves between groups without parametric assumptions.
Inputs
T1 Events
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
N1 At Risk
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
T2 Events
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
N2 At Risk
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
T3 Events
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
N3 At Risk
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
S(t₁) survival probability
Reference formula or conversion factor shown for context.
S(t₂)
Reference formula or conversion factor shown for context.
S(t₃)
Reference formula or conversion factor shown for context.
median survival reached by t₃?
The middle value of the sorted dataset.
S(t) = Π(1 - dᵢ/nᵢ)
Sample size or count used in the calculation.
log-rank test
The position in an ordered list, from best to worst or lowest to highest.