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United States National Library of Medicine National Institutes of Health

What's in PubMed? (cont.)

MEDLINE Citations

  • PubMed provides access to MEDLINE®, the National Library of Medicine’s premier bibliographic database containing citations and author abstracts from approximately 5,200 biomedical journals published in the United States and in other countries.
  • The scope of MEDLINE includes such diverse topics as microbiology, delivery of health care, nutrition, pharmacology and environmental health. The categories covered in MEDLINE include everything from anatomy, organisms, diseases, psychiatry, and psychology to the physical sciences.
  • MEDLINE currently contains over 17 million references dating back to 1948.
  • New material is added Tuesday through Saturday.
  • Coverage is worldwide, but most records (about 90%) are from English-language sources or have English abstracts.
  • Approximately 79% of the citations are included with the published abstract.
  • The National Library of Medicine leases MEDLINE data to researchers and commercial vendors, but PubMed provides free access to MEDLINE directly from NLM.

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Last reviewed: 28 April 2009
Last updated: 6 February 2009
First published: 20 March 2001
Metadata| Permanence level: Permanent: Dynamic Content