Evidence-Based Nursing (EBN)


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"Evidence-Based Practice (EBP) is a thoughtful integration of the best available evidence, coupled with clinical expertise. . . . EBP allows the practitioner to assess current and past research, clinical guidelines, and other information resources in order to identify relevant literature while differentiating between high-quality and low-quality findings." *

Levels of Evidence:

Strongest Evidence

(smaller number available, developed by many experts)


Clinical Practice Guidelines - National & International

Systematic Reviews

Moderate Evidence

(more available, often developed by fewer experts)


Clinical Practice Guidelines - Not National

Professional or Specialty Textbooks

Research-Based Protocols

Lowest Evidence

(easier to find, developed by one individual or small group or experts)

Case Studies

Expert Opinions & Theories Based on Practice

Individual Research Studies


* University of Minnesota Libraries. (n.d.). Evidence-Based Practice, Lesson 1: The Five-Step Process: Introduction. Retrieved March 3, 2010, from http://www.biomed.lib.umn.edu/learn/ebp/mod01/index.html

Questions? Email us at ihsl@isu.edu or call (208) 282-4686.

Last modified by Sue Carter

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