Unfiltered or primary sources provide evidence concerning a topic under investigation. Primary resources are generally articles that appear in peer-reviewed journals and are found primarily by searching databases.
What kinds of studies are relevant?
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The Cumulative Index to Nursing and Allied Health Literature (CINAHL) provides indexing for more than 4,600 journals from the fields of nursing and allied health from 1982 to present.
Search for your topic and then Refine your results using the Clinical Queries, Randomized Controlled Trials or Evidence Based Practice limit to search for material such as:
EMBASE is a major biomedical and pharmaceutical database.
To limit your EMBASE search to the best evidence-producing studies, search for your topic and then click on Additional Limits and filter your search by: Clinical trials, EBM-Evidence Based Medicine or Clinical Queries.
To limit your Medline search to the best evidence-producing studies, click on Additional Limits and then limit by Clinical Queries or Publication Types.
Search for your topic and then click on Limits. Evidence based material can be retrieved by ticking boxes under Type of Article (different phases of clinical trials, meta-analyses etc) or Subset (systematic reviews).
If you are interested only in clinical trials, you can also click on Clinical Trials under More Resources on the homepage or the Advanced Search page.
International coverage of the professional and academic literature in psychology, medicine, psychiatry, nursing, sociology, education, pharmacology, physiology, linguistics and other areas.
To limit your PsycINFO search to the best evidence-producing studies, click on Additional Limits to choose Methodology (study types) or Clinical Queries.
International multidisciplinary index to the literature of the social, behavioral and related sciences. Some of the subject categories included that are relevant to health science researchers are: special education, family studies, geriatrics & gerontology, health policy & services, language & linguistics, legal medicine, nursing, psychiatry, psychology, public health, rehabilitation, biomedical social issues, substance abuse, and women's studies.
Scopus is the largest abstract and citation database of research literature and quality web sources. Includes EMBASE data and is updated daily.