DS272 Advanced Search

  • View
    345

  • Download
    1

Embed Size (px)

DESCRIPTION

Controlled vocab search using Subject Heading

Text of DS272 Advanced Search

  • 1. Advanced for literature review 18 2555Tuesday, December 18, 12
  • 2. Search techniques 1. Free text search 2. Controlled text search (using MeSH) free text search list synonyms concept 2Tuesday, December 18, 12
  • 3. concept PICO SPICE ECLIPSE http://www.fadelibrary.org.uk/wp/2011/11/nice-and-spicy-introducing-the-spice-search-tool/Tuesday, December 18, 12
  • 4. Principle of the search systematic and structured approach achieve a high degree of comprehensiveness; and avoid bias in selection of studies. 9Tuesday, December 18, 12
  • 5. Developing a search strategy 1. Start with your original [clinical] question 2. Breaking it down into the concepts using - PICO framework or - develop your own set of concepts according to the question posed 10Tuesday, December 18, 12
  • 6. Developing a search strategy (Cont.) 3. For each concept, compile a list of possible synonyms and spelling variations which might have been used by different authors to describe the concept.DS611/2010 13Tuesday, December 18, 12
  • 7. Developing a search strategy (Cont.) If you already know of relevant papers scan them for more possible search terms. This first list will provide you with free text terms.DS611/2010 14Tuesday, December 18, 12
  • 8. synonyms combine OR concept P AND I AND C AND ODS611/2010 20Tuesday, December 18, 12
  • 9. Controlled Text Search list controlled text terms subject headings Medline, MeSH (Medical Subject Headings)DS611/2010 23Tuesday, December 18, 12
  • 10. Semi-Automatic IndexingTuesday, December 18, 12
  • 11. Free text versus MeSH MeSH MeSH is a special vocabulary developed by the NLM to index each reference. Because free text words are uncontrolled vocabulary that is, there is no guarantee that the word as used by the author is either relevant to or specific enough for your search.DS611/2010 24Tuesday, December 18, 12
  • 12. Example: free text oral cancer MeSH term Mouth Neoplasm Mouth Neoplasm Author DS611/2010 25Tuesday, December 18, 12
  • 13. MeSH Tree Subject Headings and Sub Headings MeSH 2 In PubMed, use MeSH database under PubMed services ( ) or Use MeSH browser (click in the MeSH database or search for it through google)DS611/2010 26Tuesday, December 18, 12
  • 14. MeSH tree heading DS611/2010 27Tuesday, December 18, 12
  • 15. MeSH database PubMed 2 DS611/2010 28Tuesday, December 18, 12
  • 16. MeSH databaseDS611/2010 29Tuesday, December 18, 12
  • 17. Explode vs. Focus Explode includes all MeSH terms found below this term in the MeSH tree.DS611/2010 30Tuesday, December 18, 12
  • 18. [Nice to know] Opposite of truncation . article DS611/2010 16Tuesday, December 18, 12
  • 19. Truncation In PubMed interface to Medline, use * e.g. dent* will find all terms that begin with the letters d-e-n-t, including dental, dentistry, dentist and so on.DS611/2010Tuesday, December 18, 12
  • 20. suggested reading http://wiki.ubc.ca/ Library:Finding_the_Evidence http://hlwiki.slais.ubc.ca/index.php/ Systematic_review_searching 20Tuesday, December 18, 12