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Kaplan-Meier survival curves: construction, axes and reading

Understand the model, recognise it in a stem, separate the look-alikes, then apply it.

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1.0 0.5 0 survival probability time since randomisation → treatment control curves compared by the log-rank test · hazard ratio from a Cox model
Kaplan-Meier survival curves
01Memory anchor
Step = an event; tick = a censored exit; height = the proportion still event-free.

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