• Lukas G Keil, Timothy F Platts-Mills, and Christopher W Jones.
• School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC.
• Ann Emerg Med. 2015 Oct 1;66(4):424-427.e2.

Study ObjectivePublication bias compromises the validity of systematic reviews. This problem can be addressed in part through searching clinical trials registries to identify unpublished studies. This study aims to determine how often systematic reviews published in emergency medicine journals include clinical trials registry searches.MethodsWe identified all systematic reviews published in the 6 highest-impact emergency medicine journals between January 1 and December 31, 2013. Systematic reviews that assessed the effects of an intervention were further examined to determine whether the authors described searching a clinical trials registry and whether this search identified relevant unpublished studies.ResultsOf 191 articles identified through PubMed search, 80 were confirmed to be systematic reviews. Our sample consisted of 41 systematic reviews that assessed a specific intervention. Eight of these 41 (20%) searched a clinical trials registry. For 4 of these 8 reviews, the registry search identified at least 1 relevant unpublished study.ConclusionSystematic reviews published in emergency medicine journals do not routinely include searches of clinical trials registries. By helping authors identify unpublished trial data, the addition of registry searches may improve the validity of systematic reviews.Copyright © 2014 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.

10 keywords...

hide…