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Topic:Semiparametric Regression Analysis of Interval-Censored Multi-State Data with An Absorbing State
Time:9:30 am - 10:30 am
Venue:Zoom Meeting (please refer to seminar PDF)
Category:Latest Seminars and Events
Speaker:Yu GU

In studies of chronic diseases, the health status of a subject can often be characterized by a finite number of transient disease states and an absorbing state, such as death. The times of transitions among the transient states are ascertained through periodic examinations and thus interval-censored. The time of reaching the absorbing state is known or right-censored, with the transient state at the previous instant being unobserved. In this talk, I will present a general framework for analyzing such multistate data through semiparametric proportional intensity models with random effects. Nonparametric maximum likelihood estimation and sieve estimation are combined for inference, and a stable EM algorithm is developed for computation based on latent Poisson variables. The estimators are shown to be consistent, asymptotically normal and efficient. I will demonstrate the performance of the proposed methods through simulation studies and provide an application to a cardiac allograft vasculopathy study.

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