Cost-value analysis of health interventions: introduction and update on methods and preference data.

According to the consensus statement from the International Society for Pharmacoeconomics and Outcomes Research Quality-Adjusted Life-Year (QALY) workshop in Philadelphia in 2007 "concerns for fairness may cause social resource allocation preferences to deviate considerably from the ranking that consideration of costs per QALY would suggest." Salient concerns for fairness include the view that priority should be given to the severely ill over the less severely ill, that people have a right to realize their potential for health even if their capacity to benefit from treatment is moderate, and that everybody has the same right to treatment that averts premature death, even if their health and functional level is less than perfect. Cost-value analysis incorporates these concerns in formal economic evaluation of health interventions and programs and thus has a potential for ranking interventions and programs in a way that is more consistent with societal values. Data on the strength of public concerns for fairness are now sufficient to be useful in formal economic evaluation. The data may, within a context of fair and open deliberations, help societal decision makers to roughly indicate the societal value of a QALY in different circumstances and thus determine a tentative grading of willingness to pay for a QALY.