失能调整生命年 Disability-adjusted life year
(重定向自Disability adjusted life years)
失能调整生命年(DALY)是衡量整体疾病负担的一种方法。最初是由世界卫生组织所开发,现在则渐渐地在公共卫生和健康影响评估等方面变得普遍。失能调整生命年「扩展了因过早死亡而损失的潜在寿命这一概念…将因为健康状况不佳或失能而损失的『健康』年岁也包括进去。」这么做,即可以将死亡率和发病率合并成单一的、共同的度量。
传统上,健康负债是以寿命损失年(YLL)(的期望值或平均数)来表示。此一量测并没有将失能的影响考虑进去,而这可以以健康生命损失年(YLD)来表示。失能调整生命年即是上述两个部份的加总。公式如下:
![Disability-adjusted life years out of 100,000 lost due to any cause in 2004.[1]
no data
fewer than 9,250
9,250–16,000
16,000–22,750
22,750–29,500
29,500–36,250
36,250–43,000
43,000–49,750
49,750–56,500
56,500–63,250
63,250–70,000
70,000–80,000
more than 80,000](/uploads/202501/09/All_Causes_world_map_-_DALY_-_WHO2004.svg3456.png)

![Some studies use DALYs calculated to place greater value on a year lived as a young adult. This formula produces average values around age 10 and age 55, a peak around age 25, and lowest values among very young children and very old people.[6]](/uploads/202501/09/Disability_Adjusted_Life_Year_Weight_Plot.svg3456.png)
