JAMAevidence Glossary. Available:
Systematic Reviews are not the same as Reviews. A review is a narrative article, whereas a systematic review has rigorous requirements for use in evidence-based medicine (see Definitions). A systematic review is a thorough, comprehensive and explicit way of interrogating the medical literature.
Systematic reviews include several steps:
Systematic reviews are regarded as the "Gold Standard" of evidence in the literature.
A meta-analysis is a statistical approach to combine the data derived from a systematic-review. Therefore, every meta-analysis should be based on an underlying systematic review, but not every systematic review leads to a meta-analysis.