What is a rare disease? The definition varies across countries, but according to the European Medicines Agency (EMA) rare diseases are those with a prevalence of <5 cases per 10,000 people; ultra-rare diseases are those with <1 case per 50,000 people. In most cases, rare… Read More »Technology assessment in rare diseases
Standard cost-effectiveness analysis assumes that any gain in quality-adjusted life years (QALYs) should be valued equally. This does not sound unreasonable, but is it true in practice? Consider two potential violations of constant value of QALY gains: scope insensitivity and severity independence. I define each… Read More »Is the value of a QALY constant?
Cost effectiveness analysis aims to capture identify (and monetize) all of a treatments benefits, risk and costs and then determine if the treatment is worth the money. Traditionally, however, benefits, risk and costs only related to benefits that accrue to the health care system. Many… Read More »Societal vs. health system perspective: does it matter?