Describe the levels of evidence and provide an example of the type of practice change that could result from each.

The levels of evidence from strongest to weakest are as follows: Systemic review of experimental studies (well-designed randomized controlled trials [RCTs]) Meta-analyses of experimental (RCT) & quasi-experimental studies Integrative reviews of experimental (RTC) & quasi-experimental studies Single experimental study (RCT) Single quasi-experimental study Meta-analysis of correlational studies Integrative reviews of correlational & descriptive studies Qualitative research meta-synthesis & meta-summaries Single correlational study Single qualitative or descriptive study Opinions of respected authorities based upon clinical evidence, reports of expert committees (Grove,...