13:31 Feb 29, 2020 |
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English to Russian translations [PRO] Medical - Medical: Pharmaceuticals / Summary of Clinical Efficacy | |||||||
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3 -1 | Случайных Эффектов Смешения-Паттернов Модели |
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Discussion entries: 2 | |
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Случайных Эффектов Смешения-Паттернов Модели Explanation: this is how it goes. ABSTRACT Random-effects models are popular for the analysis of longitudinal data in part because they easily handle missing response data. If whether data are missing or not, known as missingness, is independent of the missing data, then the missingness is ignorable. Random-effects pattern-mixture models are models that allow one to evaluate if the missingness is ignorable. In these models, one or more between-subjects variables are created to represent patterns of missing data, such as dropout, and are added to the model. Within each missing data pattern the missingness is assumed to be ignorable. Typically, these models rely on only a small number of pattern indicators to represent the missing data patterns, and the effects of the pattern indicators are fixed across subjects. Less common are applications of models in which the missing data patterns are random effects. This paper considers both types of models and their extensions to address participant dropout and intermittent patterns of missing data. In particular, beginning with SAS/STAT version 9.4 TS1M20, it is possible to estimate a 3-level model using NLMIXED, making it possible to fit a random pattern-mixture model that includes nonlinear coefficients. Empirical longitudinal psychiatric data are used to illustrate these models. https://www.researchgate.net/publication/232475500_Application_of_Random-Effects_Pattern-Mixture_Models_for_Missing_Data_in_Longitudinal_Stu https://www.lexjansen.com/wuss/2015/43_Final_Paper_PDF.pdf |
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