IAI CS2 Practice Questions - IAI Subject CS2 Risk Modelling And Survival Analysis Exam

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In the Kaplan-Meier (product-limit) estimator of the survival function S(t), what role does a censored observation play at the moment of censoring?

It causes the survival estimate to drop by 1/n at the censoring time It is removed from the dataset entirely and ignored in all calculations It reduces the risk set for subsequent event times but does not itself cause a drop in the survival estimate It is treated identically to a death at that time

Correct Answer:

It reduces the risk set for subsequent event times but does not itself cause a drop in the survival estimate

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