Analysis of the validity of the vignette approach to correct for heterogeneity in reporting health system responsiveness
Analysis of the validity of the vignette approach to correct for heterogeneity in reporting health system responsiveness
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DOI：
10.1007/s10198-010-0235-5
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发表时间：
2011-04-01
影响因子：
4.4
通讯作者：
Smith, Peter
中科院分区：
文献类型：
--
作者：
Rice, Nigel;Robone, Silvana;Smith, Peter
尽管越来越受欢迎的小插曲方法来处理自我报告，分类数据，这种方法的有效性的正式评估仍然是一个研究课题。为了使这种方法有效，需要保持一些关键假设。在本文中，我们分析了假设的“小插曲等效”使用的卫生系统反应性的数据中所载的世界卫生调查。我们进行了几个测试，以检查假设的晕映等价。首先，我们使用一个测试的基础上的全局排序的小插曲。小插曲等效性假设成立的最低条件是个体响应与小插曲的全局排序一致。第二，我们利用国家库的层次有序概率模型（HOPIT）进行敏感性分析，根据Inglehart-Welzel量表和人类发展指数对国家进行分层。该分析的结果是稳健的，表明小插曲等效假设并不矛盾。第三，我们通过一个两步回归程序来模拟受访者的报告行为，以评估受访者是否以不同的方式感知到小插曲结构。总体而言，在分析中，结果与小插曲等效性的假设并不矛盾，因此支持在分析自我报告的数据和卫生系统反应性时使用小插曲方法。
Despite the growing popularity of the vignette methodology to deal with self-reported, categorical data, the formal evaluation of the validity of this methodology is still a topic of research. Some critical assumptions need to hold in order for this method to be valid. In this paper we analyse the assumption of "vignette equivalence" using data on health system responsiveness contained within the World Health Survey. We perform several tests to check the assumption of vignette equivalence. First, we use a test based on the global ordering of the vignettes. A minimal condition for the assumption of vignette equivalence to hold is that individual responses are consistent with the global ordering of vignettes. Secondly, using the hierarchical ordered probit model (HOPIT) model on the pool of countries, we undertake sensitivity analyses, stratifying countries according to the Inglehart-Welzel scale and the Human Development Index. The results of this analysis are robust, suggesting that the vignette equivalence assumption is not contradicted. Thirdly, we model the reporting behaviour of the respondents through a two-step regression procedure to evaluate whether the vignettes construct is perceived by respondents in different ways. Overall, across the analyses the results do not contradict the assumption of vignette equivalence and accordingly lend support to the use of the vignette methodology when analysing self-reported data and health system responsiveness.