levels of evidence

 Topic 4 DQ 2

The ‘levels of evidence’ are assigned to studies based on the methodological quality of their design, validity, and applicability to patient care. These decisions give the “grade (or strength) of recommendation” (Nova, 2019). The key is that when doing a search for evidence-based literature, it is important to select the highest level of evidence that is available. Systematic reviews, meta-analysis, and critically-appraised topics/articles have all gone through an evaluation process: they have been “filtered”. Choosing topics that have been filtered versus unfiltered describes the critical appraisal of that topic. Also, not every clinical question can be answered using the same types of research.

Level I is experimental study with randomized controls with or without meta-analysis and could result in changes in therapy. Level II is quasi-experimental study with or without meta-analysis and can lead to etiology changes. Level III is non-experimental study with or without meta-analysis and can lead to changes of the meaning. Level IV is the opinion of respected authorities and/or nationally recognized expert committees/consensus panels based on scientific evidence which include clinical practice guidelines and/or consensus panels. This level of evidence describes the Clinical Consensus Statement on Tracheostomy care which in my experience, has led to changes in practice. Level V is based on experiential and non-research evidence and includes literature reviews, quality improvement, program or financial evaluation, case reports or the opinion of nationally recognized expert(s) based on experiential evidence and can lead to changes revolving around cost.

Using 200-300 words APA format with at least two references and should not be over five years old to support this discussion

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