It is important to distinguish between quantitative and qualitative research results. Both are important, and both types of research publications can be peer reviewed, but they serve different purposes and may be appropriate as supporting material in different circumstances.
To tell whether a research article is quantitative or qualitative, click the title and scan the description, especially the Major Subjects and Minor Subjects.
Descriptions of quantitative research (quantitative = quantities = numbers = statistics) will contain phrases such as chi square, inferential statistics, and analysis of variance. Controlled trials are always quantitative.
Descriptions of qualitative research will often contain the phrase qualitative studies. Other phrases that signal qualitative research are action research, ethnographic research, ethnological research, ethnonursing research, grounded theory, naturalistic inquiry, and phenomenological research.
NOTE: Research articles described as case studies are often qualitative but may be quantitative.
A good place to locate research articles is the nursing database CINAHL Complete.
Publication Type: Case Study, Clinical Trial, Meta Analysis, Meta Synthesis, Randomized Control Trial, Systematic Review.
Clinical Queries: Prognosis, Review, Qualitative, Causation
CINAHL Complete (journals, systematic reviews, care sheets)
Cochrane Collection Plus. Controlled trials and other healthcare interventions, which include the Central Register of Controlled Trials, Abstracts of Reviews of Effects, Systematic Reviews, NHS Economic Evaluation, Health Technology Assessments, and the Methodology Register.
Clinical Trials - search the ClinicalTrials.gov registry.
National Guideline Clearinghouse. Objective, detailed information on clinical-practice guidelines.
MEDLINE with Full Text - Biomedical literature from MEDLINE, life-science journals, and online books.
PubMed Clinical Queries - subset of PubMed containing results limited to specific clinical research areas.
TRIP database - overlay of many sources containing high-quality clinical-research evidence.