Proportional Rate Model with Incomplete Covariate and Complete Auxiliary Information

Zhibin Xu, Luqin Liu and Yanyan Liu

Communications in Statistics - Theory and Methods, 2015, vol. 44, issue 24, 5285-5305

Abstract: This paper deals with the analysis of proportional rate model for recurrent event data when covariates are subject to missing. The true covariate is measured only on a randomly chosen validation set, whereas auxiliary information is available for all cohort subjects. To further utilize the auxiliary information to improve study efficiency, we propose an estimated estimating equation for the regression parameters. The resulting estimators are shown to be consistent and asymptotically normal. Both graphical and numerical techniques for checking the adequacy of the model are presented. Simulations are conducted to evaluate the finite sample performance of the proposed estimators. Illustration with a real medical study is provided.

Date: 2015
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DOI: 10.1080/03610926.2013.815776

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