Nord E
National Institute of Public Health, Oslo, Norway.
Int J Health Plann Manage. 1991 Jul-Sep;6(3):234-42. doi: 10.1002/hpm.4740060308.
Asking people to place health states on a visual analogue scale is a commonly used technique for establishing social utility weights for life years. Recently, the technique has been adopted for setting priorities in the Oregon Medicaid Program in the US; as well as by the Euroqol Group in their development of an instrument meant to serve as a tool for linking cross-national valuations of health states. However, it is unclear what people mean when they value health states on a visual analogue scale. In a series of empirical studies, subjects expressed little depth of intention in relation to the valuations beyond the act of ranking states. Comparisons of the valuations, with valuations elicited by means of the equivalence of numbers technique, indicated that intervals between states on the visual analogue scale must be weighted more the closer they are to the bottom of the scale. This is the same as saying that visual analogue scale values should not be used directly as utility weights for life years. A transformation of the values is needed, and a power function may be suitable for this purpose.
让人们在视觉模拟量表上对健康状态进行评估，是一种用于确定生命年社会效用权重的常用技术。最近，该技术已被美国俄勒冈医疗补助计划用于确定优先事项；欧洲生活质量小组在开发一种旨在作为连接各国健康状态估值工具的仪器时也采用了该技术。然而，当人们在视觉模拟量表上对健康状态进行估值时，其含义并不明确。在一系列实证研究中，受试者除了对状态进行排序之外，在估值方面几乎没有表现出深入的意图。将这些估值与通过数字等价技术得出的估值进行比较后发现，视觉模拟量表上状态之间的间隔越接近量表底部，其权重就必须越大。这也就是说，视觉模拟量表的值不应直接用作生命年的效用权重。需要对这些值进行转换，幂函数可能适合此目的。
