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Nursing and Midwifery: Databases

Resources for students and staff

Key databases

Key databases for nursing and midwifery include CINAHL Plus, OVID Medline, and Scopus. For a comprehensive list see the nursing and midwifery databases page

Steps for effective database searching

Plan and execute an effective search using the following six steps. The screen shots are from the AMED (OVID) database, but the process is applicable to database searching in general.

1. What is the topic?

Discuss the value of physiotherapy interventions in the treatment of lower back pain

2. What are the key concepts?

value, physiotherapy, lower back

3. Are there other ways to express these key concepts, in order to widen the search? Some general examples:

  • synonyms (including American terminology) eg. mobile phone, cellular phone
  • plural / singular eg. woman, women
  • spelling variations eg. behaviour, behavior
  • variations of a root word eg. strategy, strategic
  • acronyms eg. ABS, Australian Bureau of Statistics

4. For each key concept, join its keywords with OR

  • value OR importance OR effect
  • physiotherapy OR physical therapy
  • low back OR lumbar spine

5. Link each key concept set with AND, to obtain records which contain at least one of the terms from each concept set:

(value OR importance OR effective) AND (physiotherapy OR physical therapy) AND (low back OR lumbar spine)

While the effect of OR is to widen the search, AND narrows or focuses the search. You may see them referred to as Boolean operators in search guides.

This is how the example search is entered in the OVID search engine using the multifield search option:

Example search in OVID

From the results list view the records which seem to be the most relevant.

Look for terms within the results, especially Subject terms, which you can use to refine the initial search. The image below shows subject terms appearing in an AMED database record from the search.

Subject terms appearing in an AMED database record

Subject terms collectively describe the main themes of the article. The same subject terms will also appear in the records for other articles in the database which substantially cover those themes.

Searching on subject terms can therefore be an effective way of focusing the search on the most relevant articles. They may also suggest terminology or aspects of the topic that you had not considered.

Below is an example of a modified search based on subject terms identified in various records from the initial search. The selection of Subject in the drop down menu will limit the search to only that part of the record. In general, the fields selected for a search do not have to be the same; eg one concept set may be set to subject terms and another in the same search may remain as the default setting (for the AMED databases “All fields”)

Further tips for modifying a search

To focus the initial search:

  • reduce the terms linked by OR
  • add another key concept, linked by AND (refer to Step 2)
  • limit by date range

To widen the initial search:

  • increase the terms linked by OR (refer to Step 3)
  • remove a key concept
  • use the truncation symbol (see below).


Typing a truncation symbol after the root of a word will find variations of that word. This can be a powerful way of expanding the search. The truncation symbol is often a star or asterisk (*). For a particular database check the online help to confirm the symbol to use. For example:

  • effect* will find effect, effects, effective, effectiveness
  • physio* will find physio, physiotherapy, physiotherapists
  • low* back will find low back, lower back

CINAHL videos - link

Database search tips

Saving searches and creating alerts