Perspectives on functional assessment: its use for policy making.

Functional assessment has the power to decide who receives care, for how much and by whom. Yet, despite its perceived value for setting public policy, these tools are often described as either flawed or formative in their development. Thus, policy-making using functional assessment could be considered premature during a time when cost and quality controls are overdue. Such a dilemma pits consumers, practitioners and researchers against policy-makers and payers as health-care decisions hang in the balance. This article presents the views of key constituencies on the readiness of functional assessment for policy-making. The discussion, focused primarily on setting health-care policy in the United States, is framed against a profile of health-care trends, within the context of the World Health Organization's International Classification of Impairments, Disabilities, and Handicaps, and with reference to the characteristics of selected tools in widespread use. These perspectives may shed light on ways to proceed for building confidence in the tools' viability for policy-making.