There are a number of useful ways to limit your retrieval in CINAHL. Under the Refine Search tab you may apply the following limits to your search:

Publication Year
You may limit to a single publication year or range of years by entering values into the boxes.

Language
CINAHL indexes journals written in languages other than English. You may limit to materials written in English if you choose.

Research Article
This limits your results to articles that have research as the publication type, which means they are reports of actual research studies. These may be research studies of any variety, from qualitative studies to randomized controlled trials. Research studies generally include discussion of the data collection procedures, methodology, results, and so on. (For material on how to conduct research, use CINAHL Headings under the broad subject heading Research, such as Clinical Nursing Research or Research, Physical Therapy, etc.) Note: Limiting to publication type research will pick up systematic reviews as well as individual studies.