| Prediction discrepancies for the evaluation of nonlinear mixed-effects models. | |
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MedLine Citation:
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PMID: 16284919 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Reliable estimation methods for non-linear mixed-effects models are now available and, although these models are increasingly used, only a limited number of statistical developments for their evaluation have been reported. We develop a criterion and a test to evaluate nonlinear mixed-effects models based on the whole predictive distribution. For each observation, we define the prediction discrepancy (pd) as the percentile of the observation in the whole marginal predictive distribution under H(0). We propose to compute prediction discrepancies using Monte Carlo integration which does not require model approximation. If the model is valid, these pd should be uniformly distributed over (0, 1) which can be tested by a Kolmogorov-Smirnov test. In a simulation study based on a standard population pharmacokinetic model, we compare and show the interest of this criterion with respect to the one most frequently used to evaluate nonlinear mixed-effects models: standardized prediction errors (spe) which are evaluated using a first order approximation of the model. Trends in pd can also be evaluated via several plots to check for specific departures from the model. |
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Authors:
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France Mentré; Sylvie Escolano |
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Publication Detail:
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Type: Evaluation Studies; Journal Article Date: 2005-11-13 |
Journal Detail:
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Title: Journal of pharmacokinetics and pharmacodynamics Volume: 33 ISSN: 1567-567X ISO Abbreviation: J Pharmacokinet Pharmacodyn Publication Date: 2006 Jun |
Date Detail:
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Created Date: 2006-07-07 Completed Date: 2006-09-26 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 101096520 Medline TA: J Pharmacokinet Pharmacodyn Country: England |
Other Details:
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Languages: eng Pagination: 345-67 Citation Subset: IM |
Affiliation:
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INSERM, U738, 46 rue Henri Huchard, Paris, France. france.mentre@bch.aphp.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Computer Simulation Likelihood Functions Models, Biological* Models, Statistical* Monte Carlo Method Pharmacokinetics* Statistical Distributions |
| Comments/Corrections | |
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