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MEDLINE : PubMed & Ovid compared

MEDLINE : PubMed & Ovid compared. Juliet Ralph Radcliffe Science Library www.ouls.ox.ac.uk/rsl. What is MEDLINE?. MEDLINE is the bibliographic database produced by the National Library of Medicine (USA) covering: Medicine Nursing Dentistry Veterinary medicine Allied health

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MEDLINE : PubMed & Ovid compared

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  1. MEDLINE : PubMed & Ovid compared Juliet Ralph Radcliffe Science Library www.ouls.ox.ac.uk/rsl

  2. What is MEDLINE? • MEDLINE is the bibliographic database produced by the National Library of Medicine (USA) covering: • Medicine • Nursing • Dentistry • Veterinary medicine • Allied health • Pre-clinical sciences.

  3. What is MEDLINE? • It contains over 17 million references to journal articles, including reviews and clinical trials • Gathered from 4,600 biomedical journals published in the United States and in 70 other countries • Dating back to 1950, with daily updates • Electronic version of Index Medicus, Index to Dental Literature, and the International Nursing Index.

  4. Index Medicus • Started in 1879 by Dr John Shaw Billings, Librarian at the Office of the Surgeon General, United States Army • A monthly classified index of the current medical literature of the world • The first of its kind • Printed volumes 1879-1950 are at the Radcliffe Science Library

  5. Subject Headings • Records are indexed with Medical Subject Headings (MeSH) : • a huge list of standard terms (over 22,000) for indexing journal articles and books in the life sciences. • Each article is tagged with 10-15 headings or subheadings. • “Major” headings are marked with an asterisk. • This allows you to retrieve articles on a subject even if they don’t have your keyword in the title.

  6. Different routes to Medline • The free one • PubMed: www.pubmed.gov

  7. And those we subscribe to • Ovid • new OvidSP interface from 1st Feb. 2008 2. SCOPUS • includes Medline & Embase 3. CSA illumina: 1997 onwards • can be searched simultaneously with TOXLINE (toxicology). • All on Oxlip www.bodley.ox.ac.uk/oxlip/

  8. A note about coverage • PubMed provides access to Medline - PLUS very recent articles not yet indexed: • On arrival they are initially tagged [PubMed - as supplied by publisher].  • Most progress to "in-process" status and later to "indexed for MEDLINE".  • Publishers also send details for articles that appear on the Web before the journal issue's release. They are tagged [Epub ahead of print].  

  9. The Ovid platform • Access to Medline – PLUS these other biomedical databases: • AMED – complementary medicine • British Nursing Index • Cinahl – nursing • Embase – medicine & pharmacology • Global Health – public health & tropical medicine • HMIC – Health Management Information Consortium • PsycInfo – psychology • ALL MOVING TO OvidSP ON 1ST FEBRUARY 2008.

  10. Isn’t Medline all I need? • Although it’s pretty comprehensive for clinical enquiries it has a strong US bias. • EMBASE (electronic version of Excerpta Medica) has better coverage of European journals and also includes more references to drugs and therapeutics.

  11. In Ovid & PubMed you can • Search using free text keywords or MeSH headings • View your search history • Combine searches • Limit results by language, date, age groups, etc. • Can also limit to Clinical Queries. • Search for a specific reference or check a faulty/incomplete reference • “View similar” articles • Save searches • Set up email alerts for new articles

  12. In PubMed: MeSH Database History Limits Single Citation Matcher MyNCBI to save searches & set up e-mail alerts OvidSP equivalent: Search tools>Map term Search history Limits Find citation Personal Account for saved searches & alerts Different buttons, similar function

  13. Links to full text : OvidSP • In our subscription databases you’ll see the linking tool • This gives access to all the e-journals Oxford is entitled to • …Even when you’re “off campus” • Remote access is possible with an Athens account • Self-register at www.oucs.ox.ac.uk/athens/

  14. Links to free full text: • PubMed • Many articles are freely available and indicated in the results list by icons such as • Free full text • Free in PubMed Central

  15. Links to Oxford full text: PubMed • What about “Abstract only” or No Abstract? • Full text (especially latest issues) isn’t always freely available • But if Oxford subscribes to the journal AND you are within the Oxford network you get access. • Go into the record and look for links such as

  16. What’s new on OvidSP? • Basic Search mode : • “Natural Language” Searching • Search Aids, eg Narrow or Broaden search, add Related Terms • Links to related authors or journals • Results are ranked by relevance (not date) • Adopts the widely used Truncation symbol * • Eg disease* retrieves diseases, diseased etc

  17. Natural Language searching • Ask a question or describe a topic in ordinary English • What are the current criteria for use of prophylactic defibrillators in MI? • Ovid produces validated terms: criteria prophylactic defibrillators heart attack • Expands to include word variations, strong synonyms, acronyms, alternative spellings • Do not “force phrasing” with quotation marks, brackets or hyphens • Be as concise as possible • Use nouns more than verbs

  18. Why use PubMed? • Freely available on the web • URL easy to remember • Quick and easy to search • For very recent articles • Clinical Queries • Search by Clinical Study Category • Find Systematic Reviews • Medical Genetics Searches

  19. Why use OvidSP? • For a new topic or a more “guided” search • Use the MeSH headings from one relevant article to go to others (hyperlinks included in “Complete Reference”) • “Find citing articles” (in other Ovid journals) • Direct export to RefWorks and other reference management packages • Links to e-journals plus library catalogues (for print holdings, if not available electronically).

  20. And search multiple databases on OvidSP • Simultaneously • You can Deduplicate results (using Search History) • OR • Do a search in one database then re-run it in another • Click on Change database • Select new database • Open and re-execute

  21. Here to help • Contact your Subject Librarian • Listed at • www.ouls.ox.ac.uk/libraries/librarians • Online enquiry service “Ask an Oxford Librarian” • www.ouls.ox.ac.uk/bodley/ask • Health Care Libraries enquiries@hcl.ox.ac.uk • Radcliffe Science Library enquiries.rsl@ouls.ox.ac.uk • juliet.ralph@ouls.ox.ac.uk

  22. Over to you • Getting started with OvidSP • Try the tutorial at • www.informs.intute.ac.uk/informs_perl/jump.pl?270-4011

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