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Zero‐inflated Poisson models with measurement error in the response

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  • Qihuang Zhang
  • Grace Y. Yi

Abstract

Zero‐inflated count data arise frequently from genomics studies. Analysis of such data is often based on a mixture model which facilitates excess zeros in combination with a Poisson distribution, and various inference methods have been proposed under such a model. Those analysis procedures, however, are challenged by the presence of measurement error in count responses. In this article, we propose a new measurement error model to describe error‐contaminated count data. We show that ignoring the measurement error effects in the analysis may generally lead to invalid inference results, and meanwhile, we identify situations where ignoring measurement error can still yield consistent estimators. Furthermore, we propose a Bayesian method to address the effects of measurement error under the zero‐inflated Poisson model and discuss the identifiability issues. We develop a data‐augmentation algorithm that is easy to implement. Simulation studies are conducted to evaluate the performance of the proposed method. We apply our method to analyze the data arising from a prostate adenocarcinoma genomic study.

Suggested Citation

  • Qihuang Zhang & Grace Y. Yi, 2023. "Zero‐inflated Poisson models with measurement error in the response," Biometrics, The International Biometric Society, vol. 79(2), pages 1089-1102, June.
    • Handle: RePEc:bla:biomet:v:79:y:2023:i:2:p:1089-1102
    DOI: 10.1111/biom.13657
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    References listed on IDEAS

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