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The quality-adjusted life year (QALY) is a generic measure of disease burden, including both the quality and the quantity of life lived. [1] [2] It is used in economic evaluation to assess the value of medical interventions. [1] One QALY equates to one year in perfect health. [2] QALY scores range from 1 (perfect health) to 0 (dead). [3]
This approach has to some extent been adopted in relation to QALYs; for example, the National Institute for Health and Care Excellence (NICE) adopts a nominal cost-per-QALY threshold of £20,000 to £30,000. [2] As such, the ICER facilitates comparison of interventions across various disease states and treatments.
Patients on the new treatment on average live an extra 3 months, so 1.25 years in total. The quality of life gained is the product of life span and quality rating with the new treatment less the same calculation for the old treatment, i.e. (1.25 x 0.6) less (1.0 x 0.4) = 0.35 QALY. The marginal cost of the new treatment to deliver this extra ...
The most commonly used outcome measure is quality-adjusted life years (QALY). [1] Cost–utility analysis is similar to cost-effectiveness analysis. Cost-effectiveness analyses are often visualized on a plane consisting of four quadrants, the cost represented on one axis and the effectiveness on the other axis. [3]
In HTAs it is usually expressed in quality-adjusted life years (QALYs). If, for example, intervention A allows a patient to live for three additional years than if no intervention had taken place, but only with a quality of life weight of 0.6, then the intervention confers 3 * 0.6 = 1.8 QALYs to the patient.
Cost-effectiveness studies using QALYs, for example, do not discount time at different ages differently. [14] This age-weighting function applies only to the calculation of DALYs lost due to disability. Years lost to premature death are determined from the age at death and life expectancy.
[3] [4] Examples of treatments include comparisons between two or more pharmaceuticals, medical devices, and other medical technologies. Quality-adjusted life years are calculated by multiplying the number of life years gained by the health utility. The adjustment accounts for the changes in health-related quality of life for a given health ...
The Equal Value of Life Years Gained or evLYG is a generic measure used to determine how much a medical treatment can extend the life of the patient. Unlike other healthcare metrics, the evLYG does not consider the quality of life for the patient; it exclusively considers the length of life.