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A case study applying pathway-oriented thinking to problem formulation for planning a systematic review.

Nicolas Roth1, Jenny Sandström1, Martin F Wilks1

  • 1Swiss Centre for Applied Human Toxicology (SCAHT), University of Basel, Missionsstrasse 64, 4055 Basel, Switzerland.

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Summary
This summary is machine-generated.

This study introduces a conceptual model for applying systematic review (SR) principles to chemical risk assessment (CRA). It aids in formulating research questions for environmental health risk evaluations, using aluminum-containing antiperspirants and breast cancer as a case study.

Keywords:
AluminiumBreast cancerChemical risk assessmentConceptual modellingProblem formulationSystematic review

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Area of Science:

  • Environmental Health Sciences
  • Toxicology
  • Risk Assessment

Background:

  • Evidence-based methods in chemical risk assessment (CRA) are emerging.
  • Systematic review (SR) principles are needed for evaluating chemical exposures and health risks.
  • Current CRA approaches require novel methods for robust problem formulation.

Purpose of the Study:

  • To develop and comment on a conceptual model for planning SRs in CRA.
  • To explore the application of systems toxicology and knowledge-assembly tools for problem formulation (PF).
  • To use aluminum-containing antiperspirants (Al-AP) and breast cancer risk as a case study for the model.

Main Methods:

  • Developed a conceptual model integrating analytic frameworks and pathway-oriented thinking.
  • Applied the model to map research questions, hypotheses, exposure routes, and outcomes.
  • Utilized concepts like Aggregate Exposure Pathways (AEP) and Adverse Outcome Pathways (AOP).

Main Results:

  • The conceptual model provides a framework for problem formulation in SR for CRA.
  • It facilitates transparent and iterative scoping of Population, Exposure, Control, Outcome (PECO) questions.
  • The model supports guiding the SR process and establishing methodological foundations.

Conclusions:

  • The conceptual model offers a structured approach to problem formulation for SR in CRA.
  • Logic modeling combined with pathway-oriented thinking enhances objectivity and transparency.
  • This approach is valuable for addressing complex environmental health questions.