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Message definition (Disease ) The [[quality-adjusted life year]] (QALY) and [[disability-adjusted life year]] (DALY) metrics are similar but take into account whether the person was healthy after diagnosis. In addition to the number of years lost due to premature death, these measurements add part of the years lost to being sick. Unlike YPLL, these measurements show the burden imposed on people who are very sick, but who live a normal lifespan. A disease that has high morbidity, but low mortality, has a high DALY and a low YPLL. In 2004, the World Health Organization calculated that 1.5 billion disability-adjusted life years were lost to disease and injury. In the developed world, [[heart disease]] and [[stroke]] cause the most loss of life, but [[neuropsychiatric conditions]] like [[major depressive disorder]] cause the most years lost to being sick.
質調整生存年 （QALY）と障害調整生存年 （DALY）の測定基準は似ているが、診断後に健康であったかどうかを考慮する。早死によって失われた年数に加え、これらの測定値は病気によって失われた年数の一部を加算する。YPLLとは異なり、これらの指標は、病気は重いが寿命は普通の人に課せられた負担を示す。罹患率は高いが死亡率が低い病気は、DALYが高く、YPLLが低い。2004年、世界保健機関（WHO）は、15億の障害調整生存年（DALY）が疾病と傷害によって失われたと計算した。先進国では、心臓病 と脳卒中 が最も多くの生命を喪失させるが、大うつ病性障害 のような精神神経疾患 は病気によって失われる年数が最も多い。