A quantitative summary of several individual studies examining the same question. The purpose is to obtain statistical confirmation of results and conclusions, e. g. for the generalization of statements.
( Appendix G) The systematic, organised, and structured evaluation of a problem of interest using information from all relevant independent randomised trials. It includes a qualitative component (application of predetermined criteria of scientific rigour, eg Appendix B) and a quantitative component (statistical combination of the data which can be pooled).
(met´a-a-nal´i-sis): The process of using statistical methods to combine the results of different studies; systematic, organized, and structured evaluation of a problem using information, commonly in the form of statistical tables, etc., from a number of different studies of the problem.