A refined parameter estimating approach for HIV dynamic model |
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| Authors: | Tao Lu Yangxin Huang Min Wang Feng Qian |
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| Institution: | 1. Department of Epidemiology and Biostatistics, University at Albany, State University of New York, Albany, NY, USA;2. Department of Epidemiology and Biostatistics, University of South Florida, 13201 Bruce B Downs, Tampa, FL, USA;3. Department of Mathematical Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, MI, USA;4. Department of Health Policy, Management, and Behavior, University at Albany, State University of New York, Albany, NY, USA |
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| Abstract: | HIV dynamic models, a set of ordinary differential equations (ODEs), have provided new understanding of the pathogenesis of HIV infection and the treatment effects of antiviral therapies. However, to estimate parameters for ODEs is very challenging due to the complexity of this nonlinear system. In this article, we propose a comprehensive procedure to deal with this issue. In the proposed procedure, a series of cutting-edge statistical methods and techniques are employed, including nonparametric mixed-effects smoothing-based methods for ODE models and stochastic approximation expectation–maximization (EM) approach for mixed-effects ODE models. A simulation study is performed to validate the proposed approach. An application example from a real HIV clinical trial study is used to illustrate the usefulness of the proposed method. |
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| Keywords: | dynamic model nonlinear mixed-effects model nonparametric mixed-effects model SAEM |
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