Level of Evidence Descriptions With Examples

The level of evidence (LOE) method provides journal readers with a quick appraisal of study quality. The most widely recognized LOE assessment tool is that from the Oxford Centre for Evidence-Based Medicine, and these guidelines are often adapted for other purposes. The assigned LOE typically depends on the design and quality of the study as well as the impact of the results. Because of the differing methods for classifying LOE, the author or journal reader should fully understand the criteria before assimilating data.