title: Medline search validity for randomised controlled trials in different areas of dental research.
abstract: OBJECTIVE
  To determine the validity of Medline searches for randomised controlled trials in dental research (RCT-Ds), using the medical subject headings (MeSH-terms).
  
  
  METHODS
  The Medline database was searched for randomised controlled trials in dental research (RCT-Ds) published in 1999 and with MeSH-terms corresponding to different areas of dental research. All RCT-Ds were manually examined for relevance to the different areas of dental research and cross-tabulated against the Medline search results. The sensitivity, specificity, positive (precision) and negative predictive values, as well as the accuracy of the search results were calculated.
  
  
  RESULTS
  The highest validity in the Medline searches for RCT-Ds was seen for endodontics, followed by orthodontics, whereas the lowest validity was seen for pediatric dentistry and public health dentistry. For pediatric dentistry the MeSH-term searches had too low a sensitivity for adequate location of RCT-Ds.
  
  
  CONCLUSIONS
  MeSH-term searches on Medline are a useful tool for rapid location of RCT-Ds in most areas of dental research. However, there is a vast variation in the search validity. More refined search strategies are required to locate RCT-Ds in areas of dental research with low search validity.
authors.affiliation: Department of Health Sciences, Kristianstad University, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Sjögren
authors.forename: A
authors.initials: A
authors.lastname: Halling
mesh_terms: D018865:Dental Research; D006801:Humans; D016247:Information Storage and Retrieval / Q000379:methods*; D016239:MEDLINE; D016032:Randomized Controlled Trials as Topic; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013039:Specialties, Dental; D013358:Subject Headings