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PubMed

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									PubMed: Medline with a
Future
         Laura Larsson
          Research Librarian
            Health Services
      revised September 2, 2012
      larsson@u.washington.edu
Objectives
 learn how to use this new Web-based
  software to perform online database
  searches
 learn basic and advanced searching
 specialized tips for finding citations
PubMed
 New development in the area of online
  database searching
MEDLINE
 bibliographic citations and author abstracts
 All fields of medicine
 3,900 current biomedical journals published
  in the United States and 70 foreign countries
 >9 million records dating from 1966+
 Medline is updated weekly and the records
  incorporated into PubMed
PREMEDLINE
 Basic citation information and abstracts
  done first, then MeSH added and record
  checked later on
 New records added to PREMEDLINE
  daily
PubMed's Homepage

 http://www.ncbi.nlm.nih.gov/pubmed
 The sidebar provides help, an overview,
  gives you NLM news and
  announcements, and gives you clinical
  queries with built in search "filters”
Graphic of Search Modes
Marvellous Features
Include:
 The Journal Browser
 The Citation Matcher program
 Related articles, or, “More Like This!!!!”
The Journal Browser
 The Journal Browser enables the viewer
  to look up journal titles by the title,
  keyword, title abbreviation or ISSN
  number.
The Citation Matcher
 if you only have
     the author’s family name and the date,
      you can locate the citation
     the author’s family name and the pages,
      you can locate the citation
     the date and pages
     other variations on this theme
Related Articles
 once you’ve found one article, you can
  click on Related Articles and find ones
  which have similar indexing and content
 very, very useful
 more on this feature, below
Four different modes of
searching
   Basic Search
   Advanced Search
   Boolean Search
   Clinical Queries
Basic Search Mode
 Enter the terms in the query box
 Terms are automatically ANDed
  together so that all terms or concepts
  appear in the records displayed
 Click on Search after all terms are
  added to enable the search
Author Searches
 enter author as: surname ii
 if you enter larsson l, you will get back
  larsson la, larsson lb, and so on
 use quotes to prevent truncation from
  occurring: “larsson l”
Author + Subject
 health care administration “ross a”
Author + Article title
 “ross a” moving into the twentieth
Journal Title Searches
 enter the journal’s full name, e.g.,
  journal of nutrition
 enter the journal’s abbreviated name,
  e.g., j nutr
 enter the ISSN, e.g., 0022-3166
 retrieval will be limited to the specified
  journal
 links to full text if articles are available
  on the Web
Journal Title + Subject
 j nutr obesity therapy
Subject 1 and Check Tag
Advanced Search Options
 Click on Advanced Search from the
  Homepage sidebar
 Field specific searches (use Search
  Field pull-down menu)
 continue to Add Terms to Query box
 terms are ANDed together
 search statement is displayed at the top
  of the screen with the number of
  citations (if any)
Lists of MeSH Terms
 select Mode | List Terms
 select the term/s you want by
  highlighting and clicking on Select
 scroll up and down the alphabetic
  display
 modify the query as desired
Subheadings
 are used with MeSH to arrive at a more
  specific aspect of a subject
 examples include: /epidemiology,
  /trends, /complications, /diagnosis (and
  so on
 look at the handout for subheadings
 enter the term/subheading; e.g.,
  asthma/drug therapy
Boolean Searches
 construct your search using the Boolean
  operators: AND, OR, NOT
 AND - (reduces the number of hits) includes
  only those citations which contain ALL the
  specified terms
 OR - (expands the number of hits) citations
  which contain the terms
Boolean Searches, continued...
 NOT - (limits) excludes those citations
 RANGE - (limits) ranges the specified term
  (e.g., publication date)
 Boolean operators must be entered
  in UPPERCASE
Truncating Terms
 Called wild card searching


 use an asterisk   *
 use when you want to use singular or plural,
  or when you have a word which might have
  several endings
Other Boolean Information
 Boolean search statements are
  processed left to right
 sample search:
 ((neoplasms/etiology [majr] AND
  sexually transmitted diseases {majr])
  NOT hiv infections [mh]) AND english
  [la] AND 1994:1993 [dp]
Graphic of Clinical Searches
Screen
Clinical Searches
 for clinicians
 has built-in search “filters”
 four study categories - therapy,
  diagnosis, etiology, prognosis are
  provided
 increase sensitivity (most relevant
  articles with some less relevant ones) or
  specificity (includes most relevant
  articles but does omit a few)
Clinical Searches,
continued…
 select Clinical Queries from the
  PubMed Homepage sidebar
 type in your subject and select the study
  Category and Emphasis | Search
 do not use this search method if you
  wish to retrieve everything
 this filter is designed to report research
  conducted with specific methodologies
 retrieval is limited!!!!
Citation Matcher
 match a list of citations to PubMed
  entries using journal, volume, issue,
  page number, and year
 select Journal Browser from the
  PubMed Homepage sidebar
 then select Citation Matcher on the
  Journal Browser sidebar
 use to locate a single article by
  selecting Citation Matcher for Single
  Articles
Retrieving Citations
 if you click or Search (or Enter) in Basic
  Mode, or if you select: Retrieve # of
  Documents (Advanced Mode) the
  search will be run
 citations are displayed in batches of 20
 citations appear on a document
  summary page
Retrieving Citations
 to print or save a larger number of
  citations, click on the Docs Per Page
  pull-down menu and select a number
  larger than your total retrieval
 then select Search
 this redoes the search and re-displays
  all the citations
To Display and Print or Save
Citations
 to view citations, or to print or save
  them, you must first display the citations
 click on the Display button
 click on the check box to the left of each
  item to select them
 no selectons = display all citations
Display Formats
 Abstract report is the default: Journal
  Citation, Title, Authors, Address or
  Affiliation, and Abstract
 MEDLINE report: two-character tagged
  field
     use for importing into bibliographic
      management software!!!!!
Formats, continued...
 Citation report: Journal Citation, Title,
  Authors, Address or Affiliation, Abstract,
  MeSH terms, chemical substances,
  MEDLINE and PubMed unique
  identifiers
 ASN.1 report: A structured format for
  the full records, in which each data
  element is explicitly represented
Printing
 File | Print or Print icon
 to save the items to a file, you must first
  go to the bottom of the page and select
  your computer (e.g. UNIX, Mac, PC,
  select the desired file format (text or
  HTML), then Save
 use text for saving to citation managers
  such as ProCite or EndNote
Print Warning
 the number of citations per page is set
  at 20 (the default)
 if you want to print more than 20
  citations at a time, click on the Docs
  Per Page pull-down menu and select
  some number greater than the number
  of citations you found and click Search.
 you wil then be able to rerun your
  search and Save or Print from your
Saving
 scroll to bottom and specify the kind of
  computer you are using: Mac, PC, UNIX
 select format (text or HTML) from the
  pull-down menus
 click on Save, select the subdirectory
  and give the file a name: filename.txt
 save as Text if you want to save to
  citation management software
Printing into a Citation
Manager
 to change the display format, select the
  Display pull-down menu at the top of the
  document summary page
 to import records into a citation
  manager, select Medline Report
Printing or Saving Citations
 display all the items, click on the check
  boxes to the left of the citations and
  then click on the Display button
Specialized Tips for Finding
Citations
 verifying a citation when all you have is
  the volume and pages
 use the Citation Matcher
 type in what you have
MeSH Browser
 displays MeSH terms in a hierarchical
  structure
 lets users select terms for searching
 searcher can attach subheadings
  directly and limit terms to a Main
  Concept
Stop Words
 these words do not get processed when
  you search
 so don’t bother to type them in
 examples: a, about, many, meanwhile,
  myself, sufficiently, where, yet, you
Other Points of Interest
 some shortcomings with the Related Articles
  algorithm
 those articles "related" to an article without an
  abstract seem to generally also not have
  abstracts
 updates and changes to the PubMed
  program are noted at:
      http://www.ncbi.nlm.nih.gov/PubMed/news.html
Where to Get Help
 The NLM PubMed Project. PubMed
  Overview
     http://www.ncbi.nlm.nih.gov/PubMed/overvi
      ew.html
 PubMed Help
     http://www.ncbi.nlm.nih.gov/PubMed/pubm
      edhelp.html
Interesting Search
 Rural AND obstetrics AND access AND
  outcomes
 what do you get when you type this
  search in?
 what does clicking on Related Articles
  get you?

								
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