title: A comparison of searching the Cochrane library databases via CRD, Ovid and Wiley: implications for systematic searching and information services.
abstract: BACKGROUND
  The Cochrane Library databases are available via different interfaces; evidence in the literature, together with anecdotal evidence, shows interfaces perform differently. To ensure the quality of searches, a study was undertaken to systematically explore the functionality of interfaces.
  
  
  OBJECTIVE
  To demonstrate differences in functionality when searching the same databases across different interfaces; to discuss the implications this may have on searching; and in a wider context, to suggest a 'best match' for comparable searching.
  
  
  METHODS
  Detailed cross-comparisons of a selection of search functions including MeSH terms, free text, proximity operators and truncation were undertaken in databases accessed via CRD, Wiley and Ovid. Up to three terms per function were selected and analysed.
  
  
  RESULTS
  Differences were identified in the way searches for MeSH headings are executed, which fields are searched, how proximity operators perform, the word order searched and where terms are searched. This adds to a body of evidence demonstrating a lack of consistency in searching across different interfaces.
  
  
  CONCLUSIONS
  A 'best match' for comparable searching is suggested. Differences between interfaces offering the same database content can have implications for the success of a search, on user education, and on database evaluation and purchasing decisions.
authors.affiliation: National Institute for Health and Care Excellence (NICE), UK.
authors.forename: Jenny
authors.initials: J
authors.lastname: Craven
authors.forename: Jayne
authors.initials: J
authors.lastname: Jefferies
authors.forename: Jenny
authors.initials: J
authors.lastname: Kendrick
authors.forename: Dave
authors.initials: D
authors.lastname: Nicholls
authors.forename: Janette
authors.initials: J
authors.lastname: Boynton
authors.forename: Ruth
authors.initials: R
authors.lastname: Frankish
mesh_terms: D016206:Databases, Bibliographic; D006801:Humans; D046650:Medical Subject Headings; D057386:Search Engine / Q000379:methods / Q000592:standards
keywords: database searching; information retrieval; library and information professionals; review and systematic search; search strategies