Evidence-based practice (EBP) is "a problem-solving approach to practice that involves the conscientious use of current best evidence in making decisions about patient care." It involves a systematic search for the most relevant evidence, as well as critical appraisal of the quality (or level) of this evidence to answer a clinical question.
Sources: Bennet, C. (2007). Evidence-based practice.
This series of 12 articles, provided free from the AJN: American Journal of Nursing website, begins with the development of the clinical (PICO) question and carries the reader through the appraisal of evidence, implementation, and dissemination of best practices.
Research articles in the medical and health sciences can be assigned to a level within a hierarchy such as the Evidence Pyramid described below. Systematic reviews, meta-analyses, randomized clinical trials and controlled trials (levels 1-3) are considered to be stronger forms of evidence than levels 4-7.
For levels 1, 2, and 3 evidence in CINAHL, you may limit your search by Publication Type.
In PubMed, limit your search by Article Type.
CINAHL Publication Types, Levels 1-3
Evidence-Based Care Sheet
Randomized Controlled Trial
For Level 4 evidence in CINAHL, clear previous limiters, and copy/paste the following line into the CINAHL advanced search:
case-control OR correlational OR cross-sectional OR longitudinal OR cohort