An introduction

1. MEDLINE®/PubMed® An introduction PubMed for Trainers, Spring 2014 U.S. National Library of Medicine (NLM) and NLM Training Center

2. Objectives By the end of this presentation, you will be able to: • Distinguish between a MEDLINE and non-MEDLINE record in PubMed. • Define: • MeSH headings • MeSH Major Topics • MeSH Subheadings • Conduct a basic PubMed search • Manipulate the results’ display • Move from your PubMed results to other resources • Identify where to customize your use of PubMed (My NCBI)

3. What is MEDLINE?

4. 1964 – MEDLINE - a database of citations to biomedical journal articles.

5. Pop Quiz

6. Highlights of MEDLINE • MEDLINE is a database of citations to published biomedical journal articles. • Over 5,600 journals are currently indexed for MEDLINE. • Journals must be approved by a review committee. • NLM indexers use Medical Subject Headings (MeSH) to index over 50,000 articles each month. • MEDLINE has over 20 million citations going back to the mid 1940s. • Most of the citations are for English-language articles and include abstracts.

7. Who decides what journals are in MEDLINE? The Literature Selection Technical Review Committee • Made up of medical experts and librarians. • Meets 3 times per year. • Considers approximately 180 titles each meeting. • Selects roughly 20-25% of reviewed titles.

8. What criteria are used to select MEDLINE journals? Critical elements for inclusion: • Scope and coverage • Quality of content • Quality of editorial work • Production quality • Audience • Types of content See Fact Sheet for selection criteria. http://www.nlm.nih.gov/pubs/factsheets/jsel.html

9. Pop Quiz

10. How has the scope of MEDLINE changed over time? See Journals Recently Accepted for Inclusion in MEDLINE: http://www.nlm.nih.gov/bsd/lstrc/new_titles.html

11. Journal Source Information Title of the journal article Names of the Authors Affiliation Abstract published with the article Language in which the article was published Publication Type (description of the type of article, e.g., Review, Letter, etc.) Controlled Vocabulary search terms (Medical Subject Headings) MEDLINE Basic Bibliographic Citation

12. What are Medical Subject Headings?

13. MeSH (Medical Subject Headings) terms are added by NLM indexers to reflect the content of the article. Indexers assign the most specific terms possible.

14. Subheadings are used with MeSH headings to be more specific. Anti-HIV Agents/therapeutic use Breast Feeding/contraindications * = a major concept.

15. What is PubMed?

16. PubMed http://www.pubmed.gov/

17. MEDLINE Licensees

18. PubMed Daily Statistics • 3.5 million Web searches (730,000 users) • 5.5 million abstract views (1.7 million users) • 5.0 million E-utilities (API) searches • 75,000 Mobile searches (18,000 users) (April 2013)

19. What’s in PubMed? • includes: • records for online books & chapters • out of scope articles

20. Pop Quiz

21. PubMed Record Status Tags

22. How to Search PubMed aids drugs breast feeding

23. Search Results

24. Automatic Term Mapping (ATM) PubMed uses Automatic Term Mapping which recognizes thousands of concepts and maps to an appropriate term. ATM Checks these tables: • Subjects (Medical Subject Headings) • Journal Titles • Authors

25. Search details

26. The Search Details feature lets you see how your search was mapped. http://www.ncbi.nlm.nih.gov/mesh/82019380

27. See the Difference: “aids drugs” + “breast feeding” = 3 aids drugs breast feeding = 461 (processed using ATM)

28. Pop Quiz

29. Citation Sensor fauci cell 2007

30. Citation Sensor

31. Title Matcher

32. How to search

33. Abstract display

35. Links Between Databases

37. Customizing PubMed Using My NCBI My NCBI allows you to: • Save records (Collections, My Bibliography) • Save searches (Saved Searches) • Customize your results (Filters, My NCBI Preferences)

38. My NCBI homepage

39. Register for an account • Homework: Register for a My NCBI account if you don’t already have one. • Throughout the class, the instructors will point out useful features of My NCBI to use when searching PubMed

40. PubMed Mobile Mobile-friendly version of PubMed Minimal feature set: Small HTML, CSS, JavaScript VIDEO: PubMed Mobile Demonstration

41. Online Help and Training

42. Summary • The MEDLINE database of biomedical journal citations is the heart of PubMed. • MEDLINE includes only good quality journals deemed important and relevant by a committee of experts. • MEDLINE is available for free using PubMed, but it is also available from other database searching systems. • MEDLINE is enhanced with Medical Subject Headings (MeSH), which improve access to the literature and can be used for searching.

43. Summary (continued) • Search PubMed by entering the main concepts of your search without punctuation. Your terms will automatically map to MeSH. • Enter components of references (author, title, journal) to find a known article or set of articles. • The full text article may be linked from the PubMed record using an icon in the upper right of the abstract display. • Explore related citations and related information from the right column of your search results and the abstract display. • Customize your PubMed search experience using My NCBI

44. Conclusions You will now be able to: • Distinguish between a MEDLINE and non-MEDLINE record in PubMed. • Define: • MeSH headings • MeSH Major Topics • MeSH Subheadings • Conduct a basic PubMed search • Manipulate the results’ display • Move from your PubMed results to other resources • Identify where to customize your use of PubMed (My NCBI)