Center for Global Health and Diseases, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.
PLoS Negl Trop Dis. 2008 Mar 26;2(3):e209. doi: 10.1371/journal.pntd.0000209.
The disability-adjusted life year (DALY) initially appeared attractive as a health metric in the Global Burden of Disease (GBD) program, as it purports to be a comprehensive health assessment that encompassed premature mortality, morbidity, impairment, and disability. It was originally thought that the DALY would be useful in policy settings, reflecting normative valuations as a standardized unit of ill health. However, the design of the DALY and its use in policy estimates contain inherent flaws that result in systematic undervaluation of the importance of chronic diseases, such as many of the neglected tropical diseases (NTDs), in world health. The conceptual design of the DALY comes out of a perspective largely focused on the individual risk rather than the ecology of disease, thus failing to acknowledge the implications of context on the burden of disease for the poor. It is nonrepresentative of the impact of poverty on disability, which results in the significant underestimation of disability weights for chronic diseases such as the NTDs. Finally, the application of the DALY in policy estimates does not account for the nonlinear effects of poverty in the cost-utility analysis of disease control, effectively discounting the utility of comprehensively treating NTDs. The present DALY framework needs to be substantially revised if the GBD is to become a valid and useful system for determining health priorities.
残疾调整生命年(DALY)最初在全球疾病负担(GBD)项目中作为一种健康衡量标准似乎很有吸引力,因为它旨在全面评估过早死亡、发病率、功能障碍和残疾。最初认为 DALY 将在政策制定中有用,反映了作为一种标准化的健康不良单位的规范评估。然而,DALY 的设计及其在政策估算中的使用存在内在缺陷,导致对慢性疾病(如许多被忽视的热带病(NTD))在世界卫生中的重要性存在系统性低估。DALY 的概念设计主要来自于个人风险的视角,而不是疾病的生态系统,因此未能认识到背景对疾病负担对贫困人口的影响。它不能代表贫困对残疾的影响,这导致对 NTD 等慢性疾病的残疾权重的严重低估。最后,DALY 在政策估算中的应用没有考虑到贫困在疾病控制的成本效益分析中的非线性影响,从而有效地降低了全面治疗 NTD 的效用。如果 GBD 要成为确定卫生重点的有效和有用的系统,那么 DALY 框架需要进行实质性修订。
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