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Levels of Evidence Pyramid

Understanding the levels of evidence presented in each study design will help you to find the strongest evidence to support your research. Each ascending tier corresponds to a stronger study design in aspects such as rigor, reliability, and reduction of bias. While many versions of the evidence pyramid exist, this example, from Tufts University, is especially detailed.

“Evidence Pyramid” by Tufts University can be reused under the BY-NC-SA license 4.0

• Tufts Evidence Pyramid Tutorial (08:44 duration)
• Tufts Evidence Pyramid PDF handout