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A Norwegian 15D value algorithm: proposing a new procedure to estimate 15D value algorithms.

Yvonne Anne Michel1, Liv Ariane Augestad2, Mathias Barra3

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A new valuation method provides lower Norwegian 15D health state values, aligning with other quality of life instruments for better health economic analyses.

Keywords:
15DHealth-related quality of lifeValue algorithmVisual analogue scale

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Area of Science:

  • Health Economics
  • Quality of Life Research
  • Psychometrics

Background:

  • No existing Norwegian algorithm for healthcare decision-making using 15D values.
  • Original 15D valuation procedure yields higher values than other HRQoL instruments.
  • Need for empirically grounded Norwegian 15D health state values.

Purpose of the Study:

  • Develop and validate a new 15D valuation procedure for Norway.
  • Estimate Norwegian 15D health state values using the novel procedure.
  • Assess the empirical performance and comparability of the new values.

Main Methods:

  • Utilized visual analogue scale for data collection in a Norwegian general population sample.
  • Implemented a simplified valuation procedure with fewer tasks and empirically anchored ranges.
  • Compared new Norwegian 15D values against five other HRQoL instruments across diverse patient groups and healthy controls.

Main Results:

  • New Norwegian 15D health state values range from 1 to -0.52.
  • Values derived from the new procedure are lower than those from the original method.
  • The updated values demonstrate greater consistency with other established HRQoL instruments.

Conclusions:

  • The revised 15D valuation procedure is more user-friendly and empirically robust.
  • New procedure better integrates 15D values with the Quality-Adjusted Life Year (QALY) model requirements.
  • Recommended for use in Norwegian health economic analyses and future 15D valuation studies.