A systematic review answers a specific research question by evaluating and summarizing all the studies on the topic.
A meta-analysis goes on to use statistical methods to combine the data from the studies. By doing this, meta-analyses can provide more precise estimates of the effects of interventions than those derived from the individual studies included within a review.
Not every systematic review can include a meta-analysis. A meta-analysis may not be feasible if the designs of the studies or the outcomes measured are too different.
