PubMed is a free US government database of biomedical and life sciences literature resources. It has over 38 million (indexes of citations and abstracts)?? from various sources, including journals, books, and conference proceedings. There are millions of active users. It contains the research Abstracts (short summaries) and typically includes links to the full research articles. The links may be free open-sources such as PubMed Central or to publishers websites that require subscriptions.
PubMed has several features for enhanced search; built in Filters, Key Word indexes, MeSH (Medical Subject Headings) indexing, Similar Articles, Advanced Search Builder and more. There is a review and acceptance process for publishers to be included in PubMed. High quality peer reviewed sources can be given the medline classification with some or all of their articles noted??? as medline articles. In recent years, approximately 60% of PubMed articles are classified as medline.
Medline articles have the added benifit of being indexed with MeSH terms which helps classifying the research and enhances search. Using MeSH and its search features help narrow down and focus within specific research areas. There are 40,000 MeSH terms (?) and to get a understanding of the classification system and which areas are used the most see this MeSH recap. Other medline sources such as EBSCO or OVID medline all pull the medline data from PubMed.
All articles have key word matching and ATM to aid in search. There are built in filters such as Publication Date, Free Full Text, and MEDLINE. You can also use key tags such as [dp] date of publication and [author] directly in the search box.
There are over 9,000 active publishers in PubMed, most are journals, but there are also conference publications, books and more. To get a good overview of current sources see the Journal Ranking Report. You will notice, several large journals with the top 50 representing 20% of the total. They have varying levels of free or medline articles. ORCID which is a common research ID can be searched, but not all journals or articles use them. Approximately 50% of current articles have them and the trend is growing.
A bit more than 50% of PubMed is also contained in PubMed Central. PubMed contains key article information such as Author names, Abstracts (summaries), Publication dates and more with links to the full articles, some of which are behind paywalls. PubMed Central articles are free and contain the full text of the research. The benifit of search within PubMed Central is the full text is already there and its free. However, there are additional free and paid articles in PubMed not in PubMed Central. Due to the larger scope most users search PubMed, but PubMed Central has its place.
The difference between Clinical Trials filter in PubMed and clinicaltrials.gov...
Related tools; PubMed PubReminer, .... PubMed Citation Bar
How to search.... Not full text search...
YouTube
Network of the National Library of Medicine [NNLM] - main YouTube account of NNLM
How PubMed Works: Medical Subject Headings (MeSH). October 15, 2024
PubMed, MEDLINE, and PubMed Central (PMC): What's the Connection? (older)..
The Texas Medical Center Library ??
Eastern Kentucky University Libraries ??
Health Sciences Library JABSOM ???
Carrie Price ??
UAMS (2,000 videos)
Treadwell Library @ Massachusetts General Hospital
UICLibrary (many recnt videos)
Raynor Library (many recent)
Lincoln Memorial University Libraries