Deriving a Korean SF-6Dv2 Value Set Using a Discrete Choice Experiment with Duration

Area of Science:

• Health Economics
• Psychometrics
• Biostatistics

Background:

• The SF-6Dv2 is a valuable tool for health state valuation.
• Deriving country-specific value sets is crucial for accurate economic evaluations.
• No Korean value set for the SF-6Dv2 was previously available.

Purpose of the Study:

• To derive the first Korean value set for the SF-6Dv2.
• To enable accurate quality-adjusted life-year (QALY) calculations in Korea.
• To support health economic evaluations using SF-36v2 and SF-6Dv2 data.

Main Methods:

• An adapted international protocol using an online discrete choice experiment with duration (DCE_TTO) was employed.
• 3800 Korean adults representative of the general population participated.
• The experimental design included Core, Common, and Triplet Modules, with preferences analyzed using logit models.

Main Results:

• Model 9, based on the Core Module, was selected as the preferred model.
• The pain dimension showed the largest utility decrement (-0.496) at its worst level.
• The worst possible health state utility was -1.012, with 31.7% of states valued as worse than dead; significant preference heterogeneity was observed.

Conclusions:

• The first Korean SF-6Dv2 value set has been successfully derived.
• This value set facilitates QALY calculations from SF-36v2 and SF-6Dv2 data.
• The derived value set will support health economic evaluations within the Korean context.