Thinking about the type of study will help you build a good clinical question. As you go up the pyramid (see Strength of the Evidence Pyamid below) the quality of the references goes up but the amount of references found goes down.
Based on the EBM Pyramid. Copyright © 2006–2011. Trustees of Dartmouth College and Yale University. All Rights Reserved. Produced by Jan Glover, David Izzo, Karen Odato and Lei Wang.
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