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Scoping Reviews: How to search

Library guide for the development of scoping reviews and their associated systematic searches, and required reporting.

How to search

How to search

JBI recommends following a three-step search strategy:

Number 1 icon The first step is an initial limited search of at least two appropriate online databases relevant to the topic (such as MEDLINE and Scopus).
Number 2 icon This initial search is then followed by an analysis of the text words contained in the title and abstract of retrieved papers, and of the index terms (subject headings) used to describe the articles. A second "systematic search" using all identified keywords and index terms should then be undertaken across all included databases.
Number 3 icon Third, the reference list of identified reports and articles should be searched for additional studies. This stage may examine the reference lists of all identified studies or examine solely the reference lists of the studies that have been selected from full-text and/or included in the review.

-JBI Reviewer's Manual, Chapter 11.2.5

This page explains how to undertake the second step: the systematic database searches.

Note: When undertaking a scoping review, it is important to also search the unpublished, or non-traditionally published resources - called grey literature.

When searching for a scoping review:

  • it is best practice to search using both subject headings and keyword searches.
  • always search one database at a time.
  • always search one concept at a time.
     

Remember: a scoping search is an iterative process! You will need to constantly evaluate, validate, and verify your search results.

Your search strategy should be:

  •  comprehensive
  •   transparent
  •   replicable
  •   validated
  •   unbiased

The search process

Step 1: Map your research question

A tightly focused research question is key to your search. Make sure you have mapped your review questions using PCC, and refined the parameters in a clearly articulated protocol. You can then use your PCC breakdown to build your search strategy. For each term, list all relevant alternative keywords and relevant subject headings, using Medical Subject Headings (MeSH).

Learn more about this process by watching the video below.

Video Length: 4:58

  • Your primary review questions will inform your search strategy.
  • First, begin mapping out the main concepts in your question using a framework, like PCC.
  • Let's look at the example questions:
    What nurse-led models of care are used to manage chronic disease in high-income countries?
    What chronic diseases have been managed using nurse-led models in high-income countries?
  • Using the PCC framework:
    • Participants: NA
    • Concept: chronic diseases / nurse-led models of care
    • Context: high-income countries
  • Next, explore alternative terms for each of your PCC elements.
  • Consider different terminology, spelling, singular and plural words, generic and specific terms, acronyms, and words with/without hyphens.
  • You may need to spend some time doing preliminary searches of the literature to identify more alternative keywords. This is important as not all authors will refer to the same idea in the same words.
  • You can enhance your search by using truncation, wildcards, and phrase searching. 
  • Next, use MEDLINE to explore the relevant Medical Subject Headings (MeSH) for each of your main concepts.
  • Once you have mapped your search, run it in MEDLINE.
  • To run your search, you need to connect your keywords and concepts:
    • AND is used to connect different concepts.
    • OR is used to connect alternative keywords for the same concept.
  • Remember: searching takes time - you'll need to evaluate and validate your search to ensure it is comprehensive.
Step 2: Choose where to search

To cover the published literature you need to search a range of key databases. These should be detailed in your protocol. Remember that you should also consider searching unpublished or alternatively published materials, called grey literature.

Learn more about which databases to search by watching the video below.

Video Length: 3:56

  • The search strategy for a scoping review should aim to be comprehensive in order to identify published and unpublished resources.
  • The JBI recommends starting with an initial search of at least 2 databases relevant to the review topic, followed by an analysis of both the text words contained in the title and abstract and the subject headings used in retrieved papers.
  • Using all identified keywords and subject headings, a comprehensive search can then be developed.
  • You’ll need to search a range of databases. The databases you choose to search will depend on your review questions.
  • Primary databases are comprehensive indices of research literature and contain references to a wide range of original research.
  • As a general rule, you should at least search MEDLINE and Embase for your scoping review.
  • If your question relates to allied health or nursing, you should also search Emcare.
  • It is also recommended to search multidisciplinary databases such as Web of Science or Scopus, as these cover a broad range of subject areas.
  • Secondary databases contain articles such as systematic reviews or meta-analyses, where authors have appraised research studies using set criteria.
  • As a general rule, you should also search secondary databases such as the Cochrane Library and the Joanna Briggs Institute.
  • Only ever search one database at a time. This is important because you will need to report how many resources you found in each database.
  • You may also choose to contact authors of primary studies for further information or additional publications. This should be stated in your protocol.

Learn more:

Step 3: Run your search in MEDLINE

It's a good idea to build your initial search in MEDLINE. Be sure to use both keywords and Medical Subject Headings (MeSH).

For each PCC element:

  1. Enter the relevant subject heading/s (MeSH). If you have more than one, give each its own line.
  2. Enter your keyword line/s
  3. Then join these lines to make an 'overall set line' for that PCC element, by combining them with OR. ​

Screenshot of MEDLINE search history showing a subject heading search and a keyword search. To combine the two, select the blue boxes to the left of the lines and select OR.

4. Repeat this for each PCC element.

5. Finally, combine all of your 'overall set lines' together with AND. This will find results that address all of your PCC elements:

A screenshot of a MEDLINE search history showing multiple 'set' lines each with a subject  heading line and keyword line. To create an overall set combine all individual set lines by selecting the blue box to the left of the lines and selecting AND.


Learn more:

Navigate to Seach MEDLINE interactive tutorial

This tutorial will demonstrate how to correctly translate your PCC breakdown into a MEDLINE search.

Step 4: Run your search in other databases

After completing your MEDLINE search, you should run it in other databases. Use the same search as your MEDLINE search, tweaked only as much as necessary for it to work in the new database. This means you may need to:

  • remap subject headings, or
  • remove subject headings if the database does not have such a feature.
     

If you discover new terms in your additional database searching, these should be added to all searches to maintain consistency and comprehensiveness. This may mean revisiting earlier databases to look up any additional subject headings.


If changing to a database on a different interface, also:

  • check your special symbols (truncation and wildcards), and
  • check whether double quotes are required around phrases (e.g. "quality of life").

Learn more:

Navigate to remap your search to Embase interactive tutorial Navigate to remap your search to cochrane interactive tutorial.
This tutorial demonstrates how to correctly remap your MEDLINE search to another Ovid database. This tutorial shows you how to remap your
MEDLINE search to the Cochrane Library.
Step 5: Review your results

Review your results for relevancy by considering how well each paper matches:

  • your research questions.
  • your scoping review protocol.
  • your search terms.

 
Test your search
 for comprehensiveness

From your 'initial limited' searching, you would have identified some key articles that you expect to find as part of your review. Use these key articles to test your search's comprehensiveness. Are these articles appearing in your search results? If not, are they:

  • in a journal that is indexed by that database? 
  • picked up when you searched other databases?
  • picked up and then removed by a particular search set?

This can help you to identify additional terms for your search.

 
Also make sure you have:

  1. ​translated your question into search terms.
  2. identified all databases you need to search.
  3. checked for spelling mistakes/typos/syntax errors.
  4. been comprehensive with your search terms.
  5. looked for subject headings for your main concepts.
  6. run any subject headings used as keywords also.
  7. checked your search combinations (and, or).
     

Use Table 2: Elements for the peer review of electronic search strategies checklist (p. 153):

Easily edit searches with Ovid Search Launcher

Ovid Search Launcher allows you to enter your search in plain text, and run it in any UniSA-subscribed database on Ovid.

The Launcher provides a quick and easy way to edit your searches - move the position of search lines, add and remove terms, etc. 

Avoid inconvenient timeouts while editing on the Ovid platform, especially if working with longer, more complex strategies.

Simply paste a plain text version of your search strategy or search history into the search launcher, and from the 'Choose databases' drop down menu select the database you want to search, and then click outside the menu to retain your selection. The codes below align with the UniSA subscriptions. It is recommended to search one database at a time.

  • MEDLINE - medall
  • Embase - emczd
  • Emcare - emcr
  • PsycInfo - psyh
  • JBI - jbi

Browse UniSA’s subscribed journals and easily access PDFs

BrowZine

BrowZine™ allows you to easily access and browse journals available online via UniSA. Access via Library Website > Journals.

LibKey Nomad

LibKey Nomad™ is a Google Chrome Extension that makes it easy to access journal articles anywhere on the internet. 

 

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For instructions on how to install LibKey extension, watch this short video (1m20s).

My Bookshelf is the place where you can organise your favorite journals and stay up to date in your field!  You may rename and organise your "shelves" and "bookcases" however you'd like! This configuration will automatically sync to your other devices when you use the same login.

See the video below to learn how to add a journal to My bookshelf (11 mins)

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  • What is the BrowZine Account?

The BrowZine Account is the system used to provide personalization features throughout the BrowZine ecosystem.  Having a BrowZine Account is required for using My Bookshelf on all devices as it is used to tie together your different devices so you only need to configure My Bookshelf on one device and the configuration will sync seamlessly between them.

  • What email can I use to create my BrowZine Account?  Does it matter?

In most cases, you can use any email you would like!  For libraries using the BrowZine Pairing Service, you may be restricted to using only your university/company email address.  BrowZine will alert you to this fact if you try to use another email at one of these accounts automatically.

  • Do I have to have an account?  Can I use BrowZine at all without one?

No, you do not have to have an account to use BrowZine.  You can still browse the shelves, look up titles, read tables of contents, and download articles.  However, in order to use the personalization feature of My Bookshelf and My Articles, a BrowZine account is required so that we can synchronize and back-up your data across all devices and ensure that we keep your device accurately updated.

  • What if you can't find a journal in BrowZine?
    • ​You can try searching the name of the journal on the library website, e.g. Journal of advanced nursing.
    • For table of contents of the journal, search the web by journal title. Most publishers offer email alerts for the table of contents of the latest issue's.
    • you can get items from other libraries (Eligibility applied).
    • Remember there maybe free Open Access versions of journal articles - use the Unpaywall Chrome/Firefox extension to find them (about Unpaywall)

Learn more about searching

The following sections of this guide explore the process of systematic searching in more detail. Select the links below to go to the relevant page.

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