The terms evidence-based medicine (EBM) and evidence-based practice (EBP) are often used interchangeably.
The EBM Resources Pyramid, below, is just one pyramid used for EBP, and demonstrates different levels of evidence. As you move up the pyramid, the level of evidence gets higher. The width of each level provides context for the amount of information at each level.
Authors of a systematic review ask a specific clinical question, perform a comprehensive literature search, eliminate the poorly done studies and attempt to make practice recommendations based on the well-done studies. A meta-analysis is a systematic review that combines all the results of all the studies into a single statistical analysis of results.
Authors of critically-appraised topics evaluate and synthesize multiple research studies.
Authors of critically-appraised individual articles evaluate and synopsize individual research studies.