Disability-adjusted life years (DALYs) are a way of measuring the effects of diseases. They are calculated as the number of years lost due to ill-health, disability, or early death. The measure was developed in the 1990s as a way of comparing the overall health and life expectancy of different countries.
DALYs are used in the field of public health and health impact assessment . They include the potential years of life lost due to premature death and years of 'healthy' life lost by virtue of being in states of poor health or disability. In so doing, mortality and morbidity are combined into a single figure.[2]
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