Reference:
Burns, P. B., Rohrich, R. J., & Chung, K. C. (2011). The levels of evidence and their role in evidence-based medicine. Plastic and Reconstructive Surgery, 128(1), 305–310. https://doi.org/10.1097/PRS.0b013e318219c171
Summary:
This article discusses the importance of the hierarchical system of evidence levels in evidence-based medicine (EBM), particularly in plastic surgery. Originating from a 1979 report by the Canadian Task Force, the levels of evidence classify research quality, with randomised controlled trials (RCTs) ranked highest. The authors note that while evidence levels are crucial for clinical decision-making, not all high-level evidence is necessarily better in quality. They highlight the slow adoption of EBM in plastic surgery, with a historical prevalence of lower evidence studies. The article stresses the need for improved research quality and the potential role of observational studies in generating hypotheses. Overall, understanding these levels aids in evaluating and interpreting medical literature effectively.