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Using objective and subjective information to develop distributions for probabilistic exposure assessment

A C Taylor1

  • 1Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts 02115.

Journal of Exposure Analysis and Environmental Epidemiology
|July 1, 1993
PubMed
Summary
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Developing credible input distributions for exposure models is crucial. This study explores statistical and subjective methods for creating these distributions, impacting model interpretation and applicability.

Area of Science:

  • Environmental Science
  • Risk Assessment
  • Computational Modeling

Background:

  • Complex exposure models benefit from simulation software, but representing input variability and uncertainty remains challenging.
  • The U.S. Environmental Protection Agency (EPA) accepts Monte Carlo simulations for exposure assessment if input distributions are empirically supported.
  • Empirical data for all exposure model inputs may not always be available, necessitating subjective judgments.

Purpose of the Study:

  • To explore statistical and subjective approaches for developing input distributions in exposure models.
  • To analyze the impact of different distribution development approaches on model output interpretation and applicability.

Main Methods:

  • Investigated the application of both statistical and subjective methods for creating probability distributions for exposure model inputs.

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  • Considered the consequences of chosen distribution development approaches on the resulting model outputs.

    • Main Results:

    • The choice between statistical and subjective methods for developing exposure model input distributions significantly influences the interpretation and applicability of the results.
    • Credible input distributions are essential for valid exposure assessments using simulation software.

    Conclusions:

    • Both statistical and subjective approaches can be used to develop distributions for exposure model inputs.
    • Careful consideration of the method used to develop input distributions is necessary to ensure the reliability and utility of exposure assessment models.