TESTING FOR SUFFICIENT FOLLOW-UP AND OUTLIERS IN SURVIVAL-DATA
TESTING FOR SUFFICIENT FOLLOW-UP AND OUTLIERS IN SURVIVAL-DATA
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DOI:
10.2307/2291012
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发表时间:
1994-12-01
影响因子:
3.7
通讯作者:
ZHOU, S
中科院分区:
文献类型:
--
作者:
MALLER, RA;ZHOU, S
A situation in which a sample of failure times with many of the largest times censored may be taken as evidence of a proportion of ''immune'' or ''cured'' individuals, who are not subject to failure, in the population. A plot of the KapIan-Meier empirical distribution function for such data will tend to level off near its right extreme, provided that follow-up of individuals has been continued for long enough. This article develops a diagnostic test for sufficient follow-up in samples where there may or may not be immunes and demonstrates its properties. The procedure is illustrated on some criminological data, leading us also to propose a test for outliers in this kind of situation.