Regression analysis of informative current status data with the semiparametric linear transformation model

Da Xu, Shishun Zhao, Tao Hu, Mengzhu Yu and Jianguo Sun

Journal of Applied Statistics, 2019, vol. 46, issue 2, 187-202

Abstract: Many methods have been developed in the literature for regression analysis of current status data with noninformative censoring and also some approaches have been proposed for semiparametric regression analysis of current status data with informative censoring. However, the existing approaches for the latter situation are mainly on specific models such as the proportional hazards model and the additive hazard model. Corresponding to this, in this paper, we consider a general class of semiparametric linear transformation models and develop a sieve maximum likelihood estimation approach for the inference. In the method, the copula model is employed to describe the informative censoring or relationship between the failure time of interest and the censoring time, and Bernstein polynomials are used to approximate the nonparametric functions involved. The asymptotic consistency and normality of the proposed estimators are established, and an extensive simulation study is conducted and indicates that the proposed approach works well for practical situations. In addition, an illustrative example is provided.

Date: 2019
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DOI: 10.1080/02664763.2018.1466870

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