The relative value of different QALY types

Area of Science:

• Health Economics
• Decision Science
• Public Health Policy

Background:

• The standard economic evaluation of healthcare interventions often assumes that all Quality-Adjusted Life Years (QALYs) hold equal value.
• Previous research has explored differential QALY valuation based on beneficiary characteristics (equity considerations).
• However, the specific type of QALY gain (survival vs. quality of life improvement) has not been systematically investigated as a determinant of value.

Purpose of the Study:

• To directly and systematically explore the relative value assigned to different types of QALY gains.
• To investigate whether QALY type influences valuation, considering equity factors like age and disease severity.
• To provide empirical evidence on the heterogeneity of QALY values.

Main Methods:

• Employed a discrete choice experiment to elicit preferences for different QALY types.
• Developed a novel methodological approach for deriving relative weights for QALYs.
• Incorporated equity considerations (age and severity) into the valuation model.

Main Results:

• Results indicate that the type of QALY gain significantly influences its assigned value.
• The study provides the first direct evidence challenging the equal valuation of all QALYs.
• Valuation differences persist even when accounting for age and severity.

Conclusions:

• The assumption of equal QALY valuation is not supported by empirical evidence.
• Healthcare economic evaluations should consider the source of QALY gains (survival vs. quality of life).
• Incorporating QALY type and equity considerations offers a more nuanced approach to resource allocation.