Work out survival rate (kaplan meier) instantly with clear inputs, formula shown and shareable results.
The Kaplan-Meier estimator multiplies the conditional survival probabilities across intervals: S(t) = Π(1 − dᵏ/nᵏ). Censored subjects simply reduce the number at risk in later intervals rather than counting as events.
Kaplan-Meier estimator
S(t) = Π over intervals of (1 − dᵏ / nᵏ)
The conditional survivals 0.90, 0.8636, 0.8649 and 0.8667 multiply to about 0.5827, so 58.3% survive.
Because censored subjects have unknown outcomes; Kaplan-Meier uses their contribution up to the point they were last seen.