Document Detail


Validation and sensitivity analysis of a probabilistic model for dietary exposure assessment to pesticide residues with a Basque Country duplicate diet study.
MedLine Citation:
PMID:  14555360     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The 'fitness for purpose' of a probabilistic model designed to assess dietary exposure to pesticides was validated. The model had to meet two prerequisites. First, it should provide more realistic estimates of intake than conservative methods. Second, it should not underestimate 'true' intakes. True intakes were estimated using a duplicate diet study. Three approaches were used to check the prerequisites: visual comparison, a statistical test of a high percentile, and a comparison for each infant of the duplicate diet, conservative and model intake values. Compliance with the prerequisites was met for the six pesticides selected, in the three approaches. Model outcome distributions reduced the uncertainty, considered as the difference between conservative and duplicate diet intakes, by 75-98% for high percentiles, depending on the pesticides. A sensitivity analysis of the model based on analysis of variance for selected factors was conducted for three pesticides. The factors included concentration and food consumption input data presentations, values assigned to pesticide-food commodities without analysis, values assigned to samples with results below the limit of reporting, unit-to-unit variability and processing factors. Their significance and relevance were studied. Assigning values to pesticide-food commodities without analysis and processing factors, when available, were the most relevant factors in this study.
Authors:
A López; C Rueda; A Armentia; M Rodríguez; L Cuervo; J A Ocio
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Food additives and contaminants     Volume:  20 Suppl 1     ISSN:  0265-203X     ISO Abbreviation:  Food Addit Contam     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-10-13     Completed Date:  2004-02-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8500474     Medline TA:  Food Addit Contam     Country:  England    
Other Details:
Languages:  eng     Pagination:  S87-101     Citation Subset:  IM    
Affiliation:
Gobierno Vasco, Dirección de Salud Pública, C Donostia-San Sebastian, Vitoria-Gasteiz, Spain.
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MeSH Terms
Descriptor/Qualifier:
Diet / statistics & numerical data*
Food Contamination / analysis*
Humans
Infant
Monte Carlo Method*
Pesticide Residues / analysis*
Reproducibility of Results
Sensitivity and Specificity
Software Design
Spain
Chemical
Reg. No./Substance:
0/Pesticide Residues

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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