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I wonder if someone have looked what is actual yield of additional studies included into a systematic reviews based on proper comprehensive search vs single source preferred source (i.e. exactly what most of us doing on daily basis- Google or Pubmed etc. One thing is to pull out all existing evidence, second thing is to fairly exclude 95-99% of initial results as irrelevant etc, from all the searches and the third is final studies SR. My question is: what is actual net benefit (apart from reassurance that nothing was missing) in terms of final included SR studies which are not cross referenced by the single most powerful search engines . I guess there is no single answer, but any answer will be greatly appreciated. Nik Nik (Nikita) A. Makretsov, MD, PhD, FRCPC Anatomical pathologist, St.Paul's Hospital, Clinical Assistant Professor, University of British Columbia Department of Pathology and Laboratory Medicine 1081 Burrard St, Vancouver, BC, V6Z1Y6 Phone (604) 682-2344 x 66038 Email: [log in to unmask] ________________________________ From: Evidence based health (EBH) [mailto:[log in to unmask]] On Behalf Of Susan Fowler Sent: Friday, January 11, 2013 8:13 AM To: [log in to unmask] Subject: Re: Is the coverage of google scholar enough to be used alone for systematic reviews? If researchers want to go through far more articles then necessary, sure. GS does not allow for any good way to refine a search, nor does it allow for index mapping. Additionally, there is no way that Google Scholar can search closed databases like EMBASE and Scopus which index as much as 3X what is indexed by Medline. And of course, there are no gray lit resources being used here, like clinicaltrials.gov<http://clinicaltrials.gov> or CENTRAL. Also, I could be wrong, but I believe there are some profound difficulties in getting google scholar citations into a citation management system like EndNote. -- Susan Fowler, MLIS Medical Librarian Evidence at Becker: http://beckerguides.wustl.edu/ebm Systematic Reviews Guide: http://beckerguides.wustl.edu/SystematicReviews Becker Medical Library, Washington University in St. Louis 314-362-8092 [log in to unmask]<mailto:[log in to unmask]> On Fri, Jan 11, 2013 at 6:02 AM, Jon Brassey <[log in to unmask]<mailto:[log in to unmask]>> wrote: For interest http://www.biomedcentral.com/content/pdf/1472-6947-13-7.pdf BW jon -- Jon Brassey TRIP Database http://www.tripdatabase.com Find evidence fast