Decision Making for Healthcare Resource Allocation: Joint v. Separate Decisions on Interacting Interventions

Area of Science:

• Health Economics
• Decision Science
• Public Health Policy

Background:

• Standard guidance for healthcare resource allocation uses distinct decision rules for independent versus mutually exclusive alternatives.
• Existing literature presents ambiguity in defining "mutually exclusive" interventions.

Purpose of the Study:

• To clarify the definition of mutually exclusive alternatives in cost-effectiveness analysis.
• To identify situations where interventions exhibit non-additive effects.
• To propose a framework for incorporating interactions into healthcare technology appraisal.

Main Methods:

• Literature review of definitions for mutually exclusive interventions.
• Analysis of non-additive effects in various clinical scenarios.
• Comparison of decision-making processes by organizations like the World Health Organization and NICE.

Main Results:

• Non-additive effects, where combined intervention effects differ from the sum of individual effects, define mutually exclusive alternatives.
• Failure to account for non-additive effects can lead to suboptimal allocation of healthcare budgets.
• Current practices by some bodies, like NICE, may not fully consider interactions when appraising treatments.

Conclusions:

• Accurate identification and consideration of non-additive effects are crucial for efficient healthcare resource allocation.
• A framework incorporating interactions is proposed to improve evidence-based decision-making for healthcare technologies.
• Clarifying definitions and methods can enhance the maximization of health gains within budget constraints.