title: Some reflections on the evolution of meta-analysis.
abstract: I reflect on the evolution of meta-analysis in clinical research over 35 years since I first encountered the key ideas in the late 1970s.
authors.forename: Douglas G
authors.initials: DG
authors.lastname: Altman
mesh_terms: D035843:Biomedical Research / Q000266:history*; D002986:Clinical Trials as Topic / Q000266:history*; D003627:Data Interpretation, Statistical; D049673:History, 20th Century; D049674:History, 21st Century; D015201:Meta-Analysis as Topic; D012107:Research Design; D012196:Review Literature as Topic