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Related Experiment Videos

A multi-method approach to measuring health-state valuations.

Joshua A Salomon1, Christopher J L Murray

  • 1Evidence and Information for Policy, World Health Organization, Geneva, Switzerland. jsalomon@hsph.harvard.edu

Health Economics
|February 26, 2004
PubMed
Summary

This study introduces a novel method to estimate core health values using multiple techniques like the visual analogue scale (VAS) and time trade-off (TTO). It reveals consistent underlying values across different health valuation methods.

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Area of Science:

  • Health Economics
  • Decision Analysis
  • Psychometrics

Background:

  • Eliciting health-state valuations is complex, involving preferences, risk, and time.
  • Existing methods like VAS, TTO, SG, and PTO capture different facets but lack a unified framework.

Purpose of the Study:

  • To develop and validate a new methodological approach for estimating core health-state values.
  • To integrate responses from multiple valuation techniques into a consistent model.
  • To identify and quantify auxiliary parameters influencing valuation responses.

Main Methods:

  • Respondents completed the visual analogue scale (VAS), time trade-off (TTO), standard gamble (SG), and person trade-off (PTO).
  • Flexible parametric functions were specified to model responses across techniques.

Related Experiment Videos

  • A unified model was used to estimate underlying health-state values and auxiliary parameters.

    • Main Results:

    • Demonstrated the possibility of understanding responses across four different measurement techniques using a consistent set of core values.
    • Estimated underlying strength of preference values for health states.
    • Quantified auxiliary parameters including risk attitudes, discount rates, and scale distortion effects.

    Conclusions:

    • The proposed approach provides a consistent framework for health-state valuation.
    • Offers insights into variations observed across VAS, TTO, SG, and PTO.
    • Facilitates appropriate adjustment of valuations for use in economic analyses and summary health measures.