Effectiveness: a neglected dimension in the assessment of rehabilitation devices and equipment

Effectiveness is a term used by research methodologists when referring to the attributes of a new health care intervention (e.g. device, medication, or procedure) which if lacking may result in its rejection despite its efficacy and efficiency. Administrators and consumers increasingly require evidence to ensure that a proposed new product or manoeuvre not only 'works' (efficacy, efficiency) but is 'practical' (effective). Yet, effectiveness data are rarely described in research literature or adequately measured. Common effectiveness qualities that might be considered in the formal evaluation of new rehabilitation devices and equipment are cost, convenience to the user ('user-friendliness'), and compliance with the local standards. This article identifies some of the most important variables related to these attributes and suggests strategies for appropriate data collection and analysis. A comparison of two products evaluated in an institutional setting is used to illustrate the suggested method.