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Characterizing Risk for Cumulative Risk Assessments.

Margaret M MacDonell1, Richard C Hertzberg2, Glenn E Rice3

  • 1Environmental Science Division, Argonne National Laboratory, Argonne, IL, USA.

Risk Analysis : an Official Publication of the Society for Risk Analysis
|November 24, 2017
PubMed
Summary
This summary is machine-generated.

Cumulative risk assessment (CRA) evaluates combined environmental exposures and health effects in populations. This approach considers multiple stressors and factors, requiring specialized methods for accurate risk characterization and decision-making.

Keywords:
Cumulative risk assessmentmultiple stressorsrisk characterization

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Area of Science:

  • Environmental Health
  • Risk Assessment
  • Toxicology

Background:

  • Risk characterization synthesizes exposure data, dose-response relationships, population traits, and environmental conditions for environmental health risk assessment.
  • Traditional risk characterization often focuses on single chemicals or sources, which may not fully capture complex real-world exposures.

Purpose of the Study:

  • To summarize key steps and considerations for cumulative risk assessment (CRA).
  • To discuss distinct features of CRA compared to single-stressor assessments.
  • To present methods for characterizing cumulative risks.

Main Methods:

  • CRAs focus on specific populations, integrating all relevant exposure sources.
  • CRAs incorporate environmental and population-specific conditions, including multiple chemical and nonchemical stressors.
  • CRAs may examine multiple health effects, considering joint toxicity and interactions.
  • Simplifying methods like judgment-based and semi-quantitative indices are often necessary.
  • Uncertainty analysis is crucial due to incomplete data and complex interactions.

Main Results:

  • Three approaches for CRA risk characterization are presented: multiroute hazard index, stressor grouping by exposure and toxicity, and screening indices.
  • CRAs necessitate specialized methods to handle multiple stressors, routes, and health outcomes.
  • The translational aspect of CRA, including summaries for lay readers and context for decisions, is highlighted.

Conclusions:

  • Cumulative risk assessment provides a more comprehensive approach to evaluating environmental health risks than single-stressor methods.
  • Effective CRA requires integrating diverse data, employing appropriate methodologies, and addressing uncertainty.
  • Clear communication of findings is essential for informing risk-based decisions and public understanding.