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Exact and Asymptotic Tests for Sufficient Followup in Censored Survival Data

7 September 2021
Ross A. Maller
Sidney I. Resnick
S. Shemehsavar
    ELMLM&MA
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Abstract

The existence of immune or cured individuals in a population and whether there is sufficient followup in a sample of censored observations on their lifetimes to be confident of their presence are questions of major importance in medical survival analysis. So far only a few candidates have been put forward as possible test statistics for the existence of sufficient followup in a sample. Here we investigate one such statistic and give a detailed analysis, obtaining an exact finite sample as well as asymptotic distributions for it, and use these to calculate the power of the test as a function of the followup in the sample.

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