Which technique is best for economic appraisal when evaluating three or more treatment alternatives?

• A. Incremental benefit-cost ratio
• B. Simple payback period
• C. Net present value
• D. Cost-effectiveness ratio

Answer: (A)

When you’re comparing three or more treatment options, you assess how much extra benefit you get for each extra unit of cost as you move from one option to the next best alternative. This is called incremental benefit-cost analysis. It shows the marginal value of shifting from a less effective option to a more effective one, helping you rank options and identify dominated choices (those that cost more but deliver less). This approach is ideal for multiple alternatives because it focuses on the added value created by each step up in effectiveness, rather than evaluating each option in isolation.

Simple payback ignores the time value of money and all benefits that occur after the payback period, so it can mislead when comparing several interventions. Net present value considers money over time but, with many options, you’d still need multiple comparisons unless you structure the analysis incrementally. Cost-effectiveness ratios can be informative when outcomes are in natural units, but with more than two options you typically use the incremental form to compare the added cost per additional unit of effect as you progress through the options. So, the incremental benefit-cost ratio best fits the scenario of evaluating three or more treatment alternatives.