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Atomic Fluorescence Spectroscopy01:29

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Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which...
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Valuation survey for SF-6Dv2 in Japan based on the international protocol.

Takeru Shiroiwa1, Yosuke Yamamoto2, Tatsunori Murata3

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Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation
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Summary

A new Japanese value set for the SF-6Dv2 health classification system was developed using a discrete choice experiment. This enables quality-adjusted life year calculations for economic evaluations in Japan.

Keywords:
Health technology assessmentQALYQuality of lifeSF-6DUtility

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Area of Science:

  • Health Economics
  • Psychometrics
  • Patient-Reported Outcomes

Background:

  • The SF-6D Classification System is a widely used measure of health status.
  • An updated version, SF-6Dv2, requires a new value set for accurate application in different populations.
  • Japan previously lacked a specific value set for the SF-6Dv2.

Purpose of the Study:

  • To construct a value set for the SF-6Dv2 tailored to the Japanese population.
  • To enable the calculation of quality-adjusted life years (QALYs) for economic evaluations in Japan using the SF-6Dv2.

Main Methods:

  • An online discrete choice experiment (DCE) with duration was employed.
  • A large sample of 3933 respondents completed 15 choice tasks each.
  • A conditional logit model incorporating time interactions was used to derive the value set.

Main Results:

  • The study identified inconsistencies in the role limitation and vitality dimensions across models.
  • Physical functioning and pain dimensions demonstrated the most significant impact on utility.
  • Japanese SF-6Dv2 scores were generally lower than UK and Australian counterparts, particularly for severe physical functioning limitations.

Conclusions:

  • A Japanese value set (model 5) for the SF-6Dv2 was successfully developed.
  • This value set facilitates the use of SF-6Dv2 in health economic evaluations within Japan.
  • The findings highlight cultural or population-specific differences in health state valuations.