Abstract Details
Activity Number:
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588
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Type:
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Topic Contributed
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Date/Time:
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Wednesday, August 12, 2015 : 2:00 PM to 3:50 PM
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Sponsor:
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Biometrics Section
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Abstract #315553
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Title:
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Testing Goodness-of-Fit for the Proportional Hazards Model Based on Nested Case-Control Data
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Author(s):
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Wenbin Lu* and Mengling Liu and Yi-Hau Chen
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Companies:
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North Carolina State University and New York University School of Medicine and Academia Sinica
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Keywords:
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Goodness-of-fit test ;
Nested case-control sampling ;
Resampling
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Abstract:
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Nested case-control sampling is a popular design for large epidemiological cohort studies due to its cost effectiveness. A number of methods have been developed for the estimation of the proportional hazards model with nested case-control data; however, the evaluation of modeling assumption is less attended. Here, we propose a class of goodness-of-fit test statistics for testing the proportional hazards assumption based on nested case-control data. The test statistics are constructed based on asymptotically mean-zero processes derived from Samuelsen's maximum pseudo-likelihood estimation method. In addition, we develop an innovative resampling scheme to approximate the asymptotic distribution of the test statistics while accounting for the dependent sampling scheme of nested case-control design. Numerical studies are conducted to evaluate the performance of our proposed approach, and an application to the Wilms' Tumor Study is given to illustrate the methodology.
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Authors who are presenting talks have a * after their name.
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