The notion of evidence in evidence-based practice by the Nursing Philosophy Working Group.

Questions concerning the nature of evidence in evidence-based practice have kindled debate within nursing and other health care disciplines. Such questions include the ends for which evidence is sought, the form(s) of evidence, and the values underlying evidence-based practice. In this article, some of the issues, contradictions, and tensions implicit in these questions are highlighted. It is imperative that the nursing profession continue to explore the philosophic perspectives that underscore evidence-based practice and their implications for decision making in nursing practice.