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Related Experiment Videos

How do Zimbabweans value health states?

Jennifer Jelsma1, Kristian Hansen, Willy De Weerdt

  • 1Division of Physiotherapy, University of Cape Town, Anzio Road, Observatory, South Africa. jjelsma@uctgsh1.uct.ac.za

Population Health Metrics
|December 18, 2003
PubMed
Summary

Urban Zimbabweans consistently value health states, enabling the development of context-specific quality of life weights using the EQ-5D instrument. Local coefficients are recommended for Zimbabwean health economic evaluations.

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Area of Science:

  • Health Economics
  • Quality of Life Measurement
  • Psychometrics

Background:

  • Quality of life weights are crucial for cost-utility analyses and population health metrics.
  • Existing weights may not accurately reflect the values of diverse populations.
  • Developing context-specific weights is essential for accurate health economic evaluations.

Purpose of the Study:

  • To develop and validate quality of life weights for the Zimbabwean population.
  • To adapt the EQ-5D (EuroQol 5 Dimensions) instrument for local valuation.
  • To compare Zimbabwean health state valuations with those from the United Kingdom.

Main Methods:

  • Valuation of 38 health states using the time trade-off method by 2,384 Harare residents.
  • Analysis of 19,020 individual preferences for health states.

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  • Development of a predictive model using residual maximum likelihood linear mixed model.

    • Main Results:

    • A predictive model for EQ-5D health states was successfully developed with high validity (mean absolute difference of 0.045).
    • All EQ-5D domains significantly influenced health state values, with severe pain and self-care limitations having the largest negative impact.
    • Valuations showed consistency within the Zimbabwean urban population, despite lower average education levels compared to European populations.

    Conclusions:

    • Urban Zimbabweans demonstrate consistent health state valuations, supporting the feasibility of developing context-specific quality of life weights.
    • Locally derived coefficients are necessary, as relative domain weightings differ from standard EuroQol Group recommendations.
    • This study provides a foundation for improved health economic evaluations within Zimbabwe.