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:Slovak term: [[Slovenský termín]]
# Disability-Adjusted-Life-Year (DALY) is a summary measure of population health that combines the impact of illness disability and mortality on population health (WHO 2009).
# See also: [[Burden of disease|burden of disease]]

==Explanation==
Traditionally, health liabilities were expressed using one measure : expected or average
number of Years of Life Lost (YLL). This measure does not take the impact of disability into
account, which can be expressed by : Years Lived with Disability (YLD). DALYs are
calculated by taking the sum of these two components in a formula : DALY = YLL + YLD
(WHO 2009).

The DALY relies on an acceptance that the most appropriate measure of the effects of
chronic illness is time, both time lost due to premature death and time spent disabled by
disease. One DALY, therefore, is equal to one year of healthy life lost. Japonese life
expectancy statistics are used as the standard for measuring premature death, as the
Japanese have the longest expectancies (WHO 2009).

==Example==
A person in Southern Africa disabled by blindness who then dies aged
45 has lost several years of full health as a result of blindness, but also 35 years of life
compared to the average life expectancy of 80 in Japan.

==References==
* WHO (2009) Health impact assessment glossary: E-learning modules.

==Links==
* [http://apps.who.int/thelexicon/ WHO — The Health and Environment Lexicon]
* WHO (2009) [http://whqlibdoc.who.int/publications/2009/9789241547673_eng.pdf WHO handbook on indoor radon : a public health perspective.]

[[Category:EN]]

Disability-Adjusted-Life-Year - História úprav

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