The Disability-Adjusted Life Year (DALY) is a measure of overall disease burden expressed as the number of years lost due to ill-health, disability or early death.
DALY = YLL + YLD
Years of Life Lost - YLL
Years of potential life lost (YPLL) or potential years of life lost (PYLL), is an estimate of the average years a person would have lived if they had not died prematurely.
Years Lost due to Disability - YLD
Number of years lost due to disability (YLDs), also known as years lost due to disease or years lived with disability/disease.
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