Levels of Evidence in Nursing Research & AORN's Evidence Model

Evidence rating is a process by which scientific evidence is used to support recommendations about clinical decisions. Evidence rating has become an expectation of multidisciplinary health care organizations.


Learn More About PRISMA

Learn more about how the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) statement and checklist are used by the authors of each AORN Guideline.

View Supplementary Materials
These appraisal tools can be used by any RN or student interested in the levels of nursing research and evidence-based practice. View or download them from the following links: