New PubMed: Brief Overview of Features, Updates, and Search Syntax/Translation Changes

The National Library Medicine (NLM) has recently made the New PubMed the default PubMed platform. PubMed Legacy will be maintained for a brief period of time during the transition and it will then be retired. 

Search results in PubMed Legacy will be different from search results in the New PubMed. Below we highlight some of the features and changes to PubMed and how they may impact your search.

Why Search Results are Different in the New PubMed:
Automatic term mapping (ATM) Now Includes
• British and American spelling,
• Singular and plural word forms,
• Other synonyms or closely related terms
Truncation
• No longer limited to the first 600 variations of a term
• No longer causes a “phrase search”

New Notable Features
• Cleaner, more modern and mobile friendly user interface
• Options to automatically cite or share individual articles
• Default view: Summary
• Default sorting: Best Match
• Provides all article references (with links) and “Cited by” articles
• Scrolling results page – click “More” to get new results
• Downloadable visual  timeline of publications
• User Guide available under search bar
• Social Media sharing buttons
• Autocomplete feature displays suggestions as you type your search terms.

Features Missing in New PubMed
• Sorting options limited to only: “Best match”, “Most recent”, and “Publication Date”
• No option to download or save results as XML file
• Missing some customizations from MyNCBI (like highlighting)
• No cross-links between other NCBI databases (MeSH, Gene, GenBank, BLAST, etc)
• No PMC Images in search results
• RIS Format replaced with PubMed Format (same as MEDLINE format)

New PubMed FAQ
1. Will my saved searches and alerts carry over to the New PubMed?
Yes. Saved searches, collections, and recent activity can still be found under your NCBI Dashboard

2. Why am I getting different results in the New PubMed?
There are multiple reasons why the results differ across platforms. See "Why Search Results are Different in the New PubMed" above

3. What happened to Search Details?
Search details can now be found under Details in the “History and Search Details” box on Advanced Search page.


4. What is “Best Match” and why is it the default?
Best Match is now the sorting default for the New PubMed. This new relevance search algorithm for PubMed leverages the search history of users, their ultimate article selection with machine learning to return highly relevant articles. Using “Best Match” sorting order may retrieve slightly different search results compared to the other sorting options because of this algorithm.

5. Will PubMed Legacy still be available?
Once PubMed Legacy is removed it will no longer be updated or available. If you need to access PubMed Legacy, please contact NLM and state your case.

Questions?
Librarians are available to help you make the transition to the New PubMed. Email libref@tulane.edu (Howard-Tilton Memorial Library) or medref@tulane.edu (Matas Library) to contact a Librarian

PubMed also has a lot of resources available to assist you with the transition:
• New PubMed Transition FAQs: https://support.nlm.nih.gov/knowledgebase/article/KA-05275/en-us 
• PubMed User Guide: https://pubmed.ncbi.nlm.nih.gov/help/
• PubMed Essentials: New Quick Tours and On-Demand Class on the New PubMed: https://www.nlm.nih.gov/pubs/techbull/ma20/brief/ma20_pubmed_essentials.html

Updated May 26, 2020 by rhorlick@tulane.edu