I. Research Designs
Main Article Content
Keywords
Research, Research and development projects, Clinical trial
Abstract
Clinical research takes care primarily of the study of groups of diseased individuals in order to establish a diagnosis, estimate a prognosis and start a treatment. With this purpose, it uses the scientific method from different points of view: architectural, which is divided in cause-effect and process studies; methodological, which includes clinical trials, cohort–case-control–studies and surveys; and by objectives, which comprised diagnostic test, prognosis and treatment studies, as well as risk factors or etiologic agent studies. These designs are considered to be primary, i.e., they use information obtained directly from the subject under study; however, there are other that use information from primary studies, which are known as secondary or integration designs.
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