Step 3 - Critically Appraise the Evidence

Schemas for Appraising the Evidence
A number of taxonomies exist that can be used to rank the strength of scientific evidence.  Study design, quality of the evidence and consistency are often used to make such determinations. Randomized control trials (RCTs) and systematic reviews (SRs) are considered the goal standards in the types of evidence hierarchical structure. Some mechanisms used in the healthcare industry to grade evidence include: