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    Probabilistic dietary exposure assessment taking into account variability in both amount and frequency of consumption.

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    Authors
    Slob, Wout
    Type
    Article
    Language
    en
    
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    Title
    Probabilistic dietary exposure assessment taking into account variability in both amount and frequency of consumption.
    Publiekssamenvatting
    Probabilistic dietary exposure assessments that are fully based on Monte Carlo sampling from the raw intake data may not be appropriate. This paper shows that the data should first be analysed by using a statistical model that is able to take the various dimensions of food consumption patterns into account. A (parametric) model is discussed that takes into account the interindividual variation in (daily) consumption frequencies, as well as in amounts consumed. Further, the model can be used to include covariates, such as age, sex, or other individual attributes. Some illustrative examples show how this model may be used to estimate the probability of exceeding an (acute or chronic) exposure limit. These results are compared with the results based on directly counting the fraction of observed intakes exceeding the limit value. This comparison shows that the latter method is not adequate, in particular for the acute exposure situation. A two-step approach for probabilistic (acute) exposure assessment is proposed: first analyse the consumption data by a (parametric) statistical model as discussed in this paper, and then use Monte Carlo techniques for combining the variation in concentrations with the variation in consumption (by sampling from the statistical model). This approach results in an estimate of the fraction of the population as a function of the fraction of days at which the exposure limit is exceeded by the individual.
    DOI
    10.1016/j.fct.2005.11.001
    PMID
    16458406
    URI
    http://hdl.handle.net/10029/5610
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.fct.2005.11.001
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    entitlement

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