JSM 2005 - Toronto

Abstract #303893

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 390
Type: Topic Contributed
Date/Time: Wednesday, August 10, 2005 : 10:30 AM to 12:20 PM
Sponsor: Biometrics Section
Abstract - #303893
Title: Shared Parameter Model with Nonparametric Trajectories
Author(s): Sarah Ratcliffe*+ and Wensheng Guo
Companies: University of Pennsylvania and University of Pennsylvania
Address: 619 Blockley Hall, Philadelphia, PA, 19104-6021, United States
Keywords: Shared parameter model ; Informative dropout ; Functional random effects
Abstract:

Longitudinal studies often suffer from the problem of informative dropout. To overcome this, the longitudinal outcome and the dropout process are jointly modeled. One method for performing this is a shared parameter model where random subject effects are common to both models. Generally, these effects are the random intercept and slope. However, this is often inadequate to model the complex relationship, especially in studies with long followup times. In this talk, we present a shared parameter model, where the common subject random effects are modeled via functional random effects, and show how it can be used in practice.

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Revised March 2005