In CINAHL Plus with Full Text, you can search or browse the CINAHL Headings, or you can get the database to "suggest subject terms".
To search or browse CINAHL Headings, click on the link and follow the prompts.
To match your topic or idea to subject terms, enter your topic/idea/concept in the first search box, tick the box for "Suggest subject terms", and click on Search.
Let's use decubitus ulcers as an example. If you search the CINAHL Headings for items that contain the phrase decubitus ulcers, or if you ask the database to suggest subject terms for decubitus ulcers, you get a match for Pressure Ulcer, as shown on the headings results screen:
Clearly, the suggested CINAHL Heading (subject term) for decubitis ulcers is Pressure Ulcer.
From here, there are different ways in which you can proceed ...
1. If you tick the box for Pressure Ulcer, you are presented with a list of subheadings. The default is to Include all Subheadings, but you can narrow your choice to one or more. If you choose more than one subheading, the database will combine these with the OR operator. The idea is to work across the screen from left to right. Your selection(s) appear in the Search Term box, and you click on Search Database to actually search for articles.
Note that you are given the option to search for your original terms as a keyword. If you choose the original term (decubitus ulcers) as well as the suggested CINAHL Heading (Pressure Ulcer), the search will combine these with the OR operator.
2. If, rather than tick the box for Pressure Ulcer, you actually click on the subject heading itself, you are taken into the tree view of the subject headings - that is, the subject heading hierarchy. This can be a help because you can see broader terms and narrower terms, which you might choose to use instead. Here, the broader term is Skin Ulcer, and there are two narrower terms. Deep Tissue Injury, and Heel Ulcer.
At this screen, you can proceed to search for one subject heading or a combination of subject headings.
You can also:
Once again you work from left to right, with your selection(s) appearing in the Search Term box, and you finish the process by clicking on Search Database.
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