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Quality-Adjusted Life Year

Meaning

A Quality-Adjusted Life Year (QALY) is a metric used in health economics and clinical decision-making to quantify the value of a medical intervention, representing one year of life lived in perfect health. It is calculated by multiplying the years of life gained by a utility score, which reflects the patient’s subjective quality of life on a scale from 0 (death) to 1 (perfect health). QALYs allow for a standardized comparison of the cost-effectiveness of different healthcare treatments.