QALYs, standard gambles, and the expected budget constraint

Area of Science:

• Health Economics
• Decision Analysis
• Public Health Policy

Background:

• Quality-adjusted life-year (QALY) indices are vital for cost-utility analysis (CUA) in healthcare decision-making.
• Standard-gamble questions are commonly used to establish QALY values, but their interpretation relies on respondent assumptions.
• Previous research suggests including future consumption in cost-per-QALY calculations for life-saving interventions.

Purpose of the Study:

• To examine the impact of respondent assumptions about financial consequences on QALY values.
• To reassess the validity of including future consumption in cost-per-QALY calculations.
• To investigate the efficiency of budget allocation using CUA and identify potential biases.

Main Methods:

• Analysis of standard-gamble question methodology.
• Theoretical modeling of QALY index construction and its implications for CUA.
• Evaluation of economic efficiency under fixed healthcare budgets.

Main Results:

• Respondent assumptions regarding financial consequences significantly influence QALY values and CUA outcomes.
• The validity of including future consumption in cost-per-QALY calculations is contingent on the QALY index establishment method.
• Cost-utility analysis with a fixed budget does not generally lead to second-best efficient allocation.
• Ambiguous financial consequence assumptions in standard-gamble questions can bias against older individuals.

Conclusions:

• Careful specification of financial consequences in QALY assessments is essential for accurate CUA.
• The method of QALY index construction critically affects the interpretation of cost-effectiveness results.
• CUA may not ensure optimal resource allocation, and biases against certain populations can occur.
• Further research is needed to refine QALY measurement and CUA methodology to ensure equitable healthcare resource allocation.