Abstract Details
Activity Number:
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604
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Type:
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Contributed
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Date/Time:
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Thursday, August 7, 2014 : 8:30 AM to 10:20 AM
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Sponsor:
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Biometrics Section
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Abstract #312548
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View Presentation
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Title:
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Simultaneous Confidence Bands from Two-Sample Censored Data
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Author(s):
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Sundarraman Subramanian*+ and Nubyra Ahmed
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Companies:
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New Jersey Institute of Technology and New Jersey Institute of Technology
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Keywords:
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Bootstrap process ;
Empirical coverage probability ;
Estimated average enclosed area ;
Maximum likelihood estimator ;
Semiparametric random censorship models ;
Survival function estimator
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Abstract:
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The standard censored data bootstrap is employed to obtain nonparametric simultaneous confidence bands for the difference of two survival curves. Furthermore, a recently developed two-stage bootstrap is exploited to obtain semiparametric confidence bands for the difference. The two-stage bootstrap combines classical bootstrap with a model-based regeneration of censoring indicators. Simulation studies are presented to show that both types of proposed confidence bands are superior to a currently existing one, in the sense of having empirical coverage closer to the nominal level. Further comparison between the proposed confidence bands reveal that the model-based ones are superior, tighter and, hence, more informative. The methods are illustrated using real data sets.
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Authors who are presenting talks have a * after their name.
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