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searching for evidence

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Integrated Dentistry I
Third Year

Published in: Health & Medicine, Education
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searching for evidence

  1. 1. Searching for evidence
  2. 2. Objectives • Traditional sources of evidence • EBP sources of evidence
  3. 3. Sources of evidence • A single study vs body of evidence • Bias in sources • Traditional sources: Textbooks Personal journal collections Conference proceedings Clinical guidelines Colleagues, mentors, experts ‫ﻣﺮﺷﺪﻳﻦ‬
  4. 4. Sources of Evidence • Primary ,+@A – Original papers published in peer reviewed journals • Secondary ‫ﺗﺠﻤﻴﯿﻊ‬ – Synthesized publications of primary research ً &6%92 ‫دة‬CB(‫ا‬ ,+*&)(‫ا‬ literature that meet prespecified criteria of both -2‫2=ء‬ clinical relevance and methodologic quality – Systematic reviews, meta analysis & EB clinical practice guidelines
  5. 5. Sources of Evidence • Primary – Pubmed (MEDLINE) – EviDents (evidents.org) • Secondary – ADS Center for Evidence-based Dentistry (Ebd.ada.org) – EBD journal (Nature.com/ebd) – Oral health evidence-based practice program, Univ. of Texas Health Sciences Center (cats.uthscsa.edu) – The Cochrane Library (thecochranelibrary.org) – TRIP database (tripdatabase.com) – The Dental Elf (thedentalelf.net) – Guidelines
  6. 6. Sources of Evidence • Primary – Pubmed (MEDLINE)  Text word searching  Medical Subject Heading (MeSH) i.e., Thesaurus ‫>9&ؤ"ت‬  Clinical queries -+654(‫ا0)1ا23 ا‬  Bolean Operators: AND, OR, NOT
  7. 7. LIMITS
  8. 8. ‫ا"#$%&س‬ ‫د.)-‬ ‫ا;$:9&رات‬
  9. 9. AND A A & B OR A B NOT A B B
  10. 10. Boolean operator AND combines only sets that contain both terms Tooth paste Tooth bleaching Tooth paste AND Tooth bleaching
  11. 11. Boolean operator OR combines sets that contain at least one of the terms Tooth paste Tooth bleaching Tooth paste OR tooth bleaching
  12. 12. Boolean operator NOT excludes sets that contain the stated term even when it includes both terms Tooth paste Tooth bleaching Tooth paste NOT Tooth bleaching
  13. 13. Structured approach to database searching • Formulate a clear question • Identify the type of question 3*CF • Identify alternate terms related to PICO question (synonyms for P, I, C, O) • Identify MeSH terms for the PICO (use the MeSH browser) • List the inclusion criteria limits Language Human subject Age Gender Publication type, beginning with the highest level of evidence (e.g. systematic review)
  14. 14. Structured approach to database searching • Run search: Search each concept separately Combine retrieval with Boolean operators • Evaluate retrieval and modify search strategy, if necessary • Review the citations and abstracts ( the methodology often is included in the abstract) • Select citations that appear to address the question • Access the related full-text articles or order them ‫ﺍاﻟﻌﻮﺍاﻣﻞ ﺍاﻟﻤﻨﻄﻘﻴﯿﺔ‬ ‫ﺍاﻻﺳﺘﺸﻬﮭﮫﺎﺩدﺍاﺕت‬
  15. 15. Search for Evidence • Sources of evidence – MEDLINE – When performing a search we should a combination of • Text word searching • Medical Subject Heading (MeSH) i.e., Thesaurus Do •children with deciduous teeth who consume Clinical queries xylitol chewing gum, compared to children who • Bolean Operators: AND, OR, NOT don’t, have lower incidence of dental caries? SBARD Intro to EBD 09 by Dr. Asim Al-Ansari
  16. 16. SBARD Intro to EBD 09 by Dr. Asim Al-Ansari
  17. 17. SBARD Intro to EBD 09 by Dr. Asim Al-Ansari
  18. 18. Sources of Evidence • Secondary – Evidence-based Journals
  19. 19. Sources of Evidence • Secondary – Evidence-based Journals
  20. 20. Sources of Evidence • Secondary – Evidence-based Journals
  21. 21. Evidence Based Dentistry
  22. 22. Evidence Based Dentistry
  23. 23. Evidence Based Dentistry
  24. 24. Evidence Based Dentistry
  25. 25. Evidence Based Dentistry
  26. 26. Evidence Based Dentistry
  27. 27. Sources of Evidence • Secondary – Evidence-based Journals – The Cochrane Library
  28. 28. Tooth whitening
  29. 29. Sources of Evidence • Secondary – Evidence-based Journals – The Cochrane Library – The TRIP Database
  30. 30. Sources of Evidence
  31. 31. In adult patient, does home bleaching compared to office bleaching improve tooth whitening
  32. 32. In adult patient, does home bleaching compared to office bleaching improve tooth whitening

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