The life-years lost or years of lost life (YLL)
is a unit to measure the number of expected years of human life lost following an unexpected event, such as death by illness, crime or war.
Life-years lost is a flexible measure which have been used to measure the effects of overall mortality of non-communicable diseases,
drug misuse
and suicide,
epidemics (example
COVID-19 pandemic
The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identi ...
),
[{{Cite journal, last1=Mitra, first1=Amal K., last2=Payton, first2=Marinelle, last3=Kabir, first3=Nusrat, last4=Whitehead, first4=April, last5=Ragland, first5=Kimberly N., last6=Brown, first6=Alexis, date=June 2020, title=Potential Years of Life Lost Due to COVID-19 in the United States, Italy, and Germany: An Old Formula with Newer Ideas, journal=International Journal of Environmental Research and Public Health, volume=17, issue=12, page=4392, doi=10.3390/ijerph17124392, issn=1661-7827, pmc=7345973, pmid=32570888, doi-access=free] wars, and natural disasters such as
earthquake
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, fr ...
s. Life-years lost are based on both the number of deaths and the age of those who died. It estimates the number of years that those who died would have lived if they did not met their accidental a deadly fate. Higher YLLs can be due to larger numbers of death, few sharply younger deaths or some combination of the two.
See also
*
Quality-adjusted life year
The quality-adjusted life year (QALY) is a generic measure of disease burden, including both the quality and the quantity of life lived. It is used in economic evaluation to assess the value of medical interventions. One QALY equates to one year ...
*
Years of potential life lost
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. It is, therefore, a measure of premature mortality. As an alternative to de ...
References
Epidemiology
Health economics
Life expectancy