Concerns the statistical analysis of a very large data set from a clinical trial or observational study.
Is a particular type of systematic review.
Can use a forest plot to determine whether the results from the separate studies are compatible and assess the significance of the individual and overall effects.
Has results which are statistically heterogeneous if there is considerable variation between the estimates of the effects of interest from the various studies.
Has results which are clinically heterogeneous if each of the separate studies are focusing on different clinical endpoints of interest.