Flynn Terry N, Huynh Elisabeth, Peters Tim J, Al-Janabi Hareth, Clemens Sam, Moody Alison, Coast Joanna
Centre for the Study of Choice (CenSoC), University of Technology Sydney, Sydney, Australia.
Health Econ. 2015 Mar;24(3):258-69. doi: 10.1002/hec.3014. Epub 2013 Nov 20.
This paper reports the results of a best-worst scaling (BWS) study to value the Investigating Choice Experiments Capability Measure for Adults (ICECAP-A), a new capability measure among adults, in a UK setting. A main effects plan plus its foldover was used to estimate weights for each of the four levels of all five attributes. The BWS study was administered to 413 randomly sampled individuals, together with sociodemographic and other questions. Scale-adjusted latent class analyses identified two preference and two (variance) scale classes. Ability to characterize preference and scale heterogeneity was limited, but data quality was good, and the final model exhibited a high pseudo-r-squared. After adjusting for heterogeneity, a population tariff was estimated. This showed that 'attachment' and 'stability' each account for around 22% of the space, and 'autonomy', 'achievement' and 'enjoyment' account for around 18% each. Across all attributes, greater value was placed on the difference between the lowest levels of capability than between the highest. This tariff will enable ICECAP-A to be used in economic evaluation both within the field of health and across public policy generally.
本文报告了一项最佳-最差尺度法（BWS）研究的结果，该研究旨在评估成人调查选择实验能力量表（ICECAP-A）的价值，ICECAP-A是一种针对成年人的新能力量表，研究在英国开展。采用主效应计划及其翻转设计来估计所有五个属性四个水平中每个水平的权重。BWS研究对413名随机抽样的个体进行，并附带社会人口统计学和其他问题。经量表调整的潜在类别分析确定了两个偏好类别和两个（方差）量表类别。刻画偏好和量表异质性的能力有限，但数据质量良好，最终模型具有较高的伪r平方值。在对异质性进行调整后，估计了总体价格表。结果显示，“依恋”和“稳定性”各自约占该量表空间的22%，“自主性”“成就”和“享受”各自约占18%。在所有属性中，能力最低水平之间的差异比最高水平之间的差异被赋予了更高的价值。该价格表将使ICECAP-A能够用于健康领域内以及整个公共政策的经济评估。
