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PubMed: Database Intro & Search Tips

An introduction to PubMed.

Understanding the Results Page

There is a lot going on here...

Let's take a moment to get you familiar with the results page. 

 

Results page breakdown

The search results page has two main parts: Citation information and Search Tools. 

Citation Information:

The most important part is the item information. On the Results page, you will get a brief snapshot of each item. Highlights include:

  • Article/Item Title 

  • Author Names

  • Citation Information: includes the journal title abbreviation, volume and issue, page numbers, and article publication date

  • PMID: the unique PubMed Identification Number for each item

  • A portion of the abstract with your search terms highlighted  (if available)

  • Study type “tags”: describes the article type

    • Examples: Randomized Control Trial, Review article, Clinical Trial, etc. (if available)


Search Tools

These tools allow you to narrow the results to a more manageable number and more relevant results. 

  • Advanced Search: Click this link to see your search details, modify your search, or enter new search terms. 

  • Save, Email, Send to: A somewhat easy way to export your search results

    • Save: Save all or selected results in various formats--all results are saved as a TXT file (super basic text)

    • Email: Email all or selected results to someone else or yourself

    • Send to: a free Clipboard that saved items for 8 hours or other options that require creating a free account

  • Sorted by Best Match: The default sorting of results is Best Match (displaying the most relevant results). You can sort results by Publication Date or Most Recent (items most recently added to the database).

  • Results by Year graph: Shows the number of records by date of publication. The slider allows you to select your range of interest.

  • Filters: Available where you’d expect, in the left column. You can add more filters by clicking on the Additional Filters option at the bottom of the list. 

  • Abstract snippets with highlights: Snippets from the abstract where your search terms appear.

Limit Results with Filters

Use Filters to narrow your search results.

Filters can limit the number of search results to bring you fewer results. 

Keep in mind that these information categories are terms added by indexers. When you use filters you may be removing very recent articles that have not been indexed yet. Always look at the most recent search results before adding these filters.


Default Filters
  • Results by year

  • Publication date

  • Text Availability

  • Article Type


Find more filters
Other filters are available from the Additional Filter button at the bottom of the filters list.
  1. At the bottom of the filters list, click the plus sign next to Additional Filters

  2. Select a filter. The filter will be applied instantly. 


Clear Filters

All filters you have selected will be displayed at the top of the page in a box. If you need to remove a filter, uncheck the box from the filters column on the left side of the page. 

Understanding the Item Record

Let's take a closer look at the item record

Just like the results page, there is a lot of information in the item record. Take a look at the image below for a quick overview and the paragraph below for a more thorough explanation. 

Understanding the Item Record

While on the results page, you saw a brief snapshot of each item. Once you open an item record you will see a full citation and much more information. 

  • Basic citation info, including journal, issue, and page number (if applicable)

  • Tags indicating what type of article the citation is for. (Not every type of article has a tag)

  • Article title

  • Author information (expand to see the authors’ institutional affiliations, if present)

  • PMID or PubMed ID (the unique identifier for each PubMed citation)

  • Full abstract text


Abstract Sidebar Menu

Full-Text Links 
  • Includes our UHSP Library link to the full-text article or Interlibrary loan request form

  • A publisher link (possible paywall)

  • If available a PubMed Central (PMC) link

Actions
  • Cite: Save the citation information in AMA, APA, MLA, or NLM format

  • Favorites: Save the citation to your My NCBI account

Share
  • Social media links: Easily share information with your colleagues on Twitter or Facebook.
Page Navigation
  • A navigation menu to quickly get where you need to go.

Search History and Search Details

Searches can be combined or used later in Search History

When you are building a search it can be helpful to search for each term individually; then go back and combine each term with boolean operators AND/NOT/OR. This allows you to see results for each term and helps you determine if the term you choose is what you are looking for. 

How to Combine Searches
  1. On the PubMed main page, click the Advanced link under the main search box. 

  2. Add each completed concept to your Search History using the Add to History link. 
    After entering a term click the down arrow under the Search button to select the Add to History link. 

  3. Then go to the History and Search Details section to add the completed concepts in the History section

  4. Click the three dots under the Actions column to Add query 

  5. Then select Add with AND (or select Add with OR or Add with NOT as needed). 

  6. Once all terms are added, then click the down arrow on the Add to History button to search. 

See how PubMed is interpreting your search

The Search Details section shows how PubMed interpreted your search and applied Automatic Term Mapping. To see how your search was interpreted:

  1. In the History and Search Details section, click on the arrow under the Details column

  2. You should now see the search details.

In the image below, you can see that we entered the term "acid reflux", but PubMed searched for the term "gastroesophageal reflux".

PubMed applied automatic term mapping to expand your search to the correct medical term -- gastroesophageal reflux. Automatic term mapping is helpful when you know the common term, but not the correct medical term. PubMed also searches for the original term, just in case. 

Note: Automatic term mapping will NOT work if you put quotes around a term.