Lenert L A, Sturley A, Watson M E
Veterans Administration Healthcare System, San Diego, CA 92161, USA.
Med Decis Making. 2002 Nov-Dec;22(6):464-74. doi: 10.1177/0272989X02238296.
iMPACT3 (Internet Multimedia Preference Assessment Instrument Construction Tool, version 3) is a software development environment that helps researchers build Internet-capable multimedia utility elicitation software programs. The program is a free, openly accessible Web site (http.// preferences.ucsd.edu/impact3/asp). To develop a utility elicitation software program using iMPACT3, a researcher selects modular protocol components from a library and custom tailors the components to the details of his or her research protocol. iMPACT3 builds a Web site implementing the protocol and downloads it to the researcher's computer. In a study of 75 HIV-infected patients, an iMPACT3-generated protocol showed substantial evidence of construct validity and good internal consistency (logic error rates of 4% to 10% and procedural invariance error rates of 10% to 28%, depending on the elicitation method) but only fair 3- to 6-week test-retest reliability (intraclass correlation coefficient= 0.42 to 0.55). Further work may be needed on specific utility assessment procedures, but this study's results confirm iMPACT3's feasibility in facilitating the collection of health state utility data.
iMPACT3（互联网多媒体偏好评估工具构建工具，第3版）是一种软件开发环境，可帮助研究人员构建具备互联网功能的多媒体效用诱导软件程序。该程序是一个免费的、可公开访问的网站（http://preferences.ucsd.edu/impact3/asp）。要使用iMPACT3开发效用诱导软件程序，研究人员需从库中选择模块化协议组件，并根据其研究方案的细节进行定制。iMPACT3会构建一个实施该协议的网站，并将其下载到研究人员的计算机上。在一项对75名感染HIV的患者的研究中，一个由iMPACT3生成的协议显示出了结构效度的大量证据和良好的内部一致性（逻辑错误率为4%至10%，程序不变性错误率为10%至28%，具体取决于诱导方法），但3至6周的重测信度仅为中等（组内相关系数 = 0.42至0.55）。可能需要针对特定的效用评估程序开展进一步工作，但本研究结果证实了iMPACT3在促进健康状态效用数据收集方面的可行性。
