Resources in any health system are finite. Hospitals, clinics, and government health ministries never have enough money, staff, or equipment to fund every possible intervention. Economic appraisal provides a systematic way to compare the costs and health outcomes of alternative healthcare programs so managers and policy-makers can make rational choices. It moves decision-making away from pure intuition toward transparent, evidence-based priority setting.
Every economic evaluation tracks two main dimensions: what is put into an intervention (costs) and what is gained from it (outcomes). Costs are categorized broadly into direct medical costs (medicines, nursing time), direct non-medical costs (transport to clinic), and indirect costs (lost productivity from illness). Outcomes range from clinical measurements like blood pressure reduction to broad improvements in quality of life.
Cost-minimization analysis is used when two or more competing healthcare interventions have proven to be therapeutically equivalent. Since the health outcomes are identical, the analytical focus narrows entirely to finding which option costs less. A common nursing application is comparing two brands of wound dressings that yield the exact same healing rates and infection risks.
Cost-effectiveness analysis compares interventions that achieve the same clinical goal, but to differing degrees. Outcomes are measured in natural physical units, such as life-years gained, millimeters of mercury reduction in blood pressure, or cases of malaria averted. Results are expressed as an incremental cost-effectiveness ratio, showing the extra cost required to gain one additional unit of health outcome.
Cost-utility analysis is a specialized form of economic appraisal that measures health outcomes using Quality-Adjusted Life Years. A QALY combines both the quantity and the quality of life generated by a medical intervention. One QALY represents one year of life lived in perfect health, while states of less-than-perfect health are weighted between zero and one. This allows health planners to compare disparate programs, such as a renal dialysis unit versus a maternal immunization campaign.
Cost-benefit analysis measures both costs and health outcomes in identical monetary units. By converting life years and averted illnesses into cash values, analysts can calculate a net monetary benefit or a benefit-cost ratio. While this approach allows direct comparison between healthcare programs and investments in other sectors like transport or education, placing a monetary value on human life remains ethically challenging.