Cost analyses in assistive technology research.

Economic evaluation has become one of the principal methodologies in outcomes research within the health care field in general and specifically in assistive technology. Efforts to define and develop a consistent methodology for assistive technology economic evaluations have been hampered by lack of familiarity with the various terms and concepts associated with cost analysis, an essential aspect of economic evaluations. Adapting these concepts, which were constructed to suit a medical model, to the needs of the assistive technology field has been a challenge as well. This article outlines terms and concepts basic to cost analysis. The authors then consider five studies that relate costs to outcomes in order to illustrate the challenges, choices, and trade-offs researchers make when adapting this methodology to assistive technology. The article concludes by seeking to stimulate further discussion of the complexity inherent in assessing costs in assistive technology outcomes research and calling for the development of a standardized and consistent economic evaluation methodology.