biostatistics and clinical epidemiology
type: Concept
narrower: randomized clinical trials

controlled clinical trials
type: Concept
narrower: randomized clinical trials

randomized clinical trials
definition: A clinical trial is defined as a controlled, prospective assessment of an intervention for a disease or condition in human beings. In general, the purposes of randomized clinical trials, or Phase III trials, are to evaluate the efficacy of a novel treatment relative to an observation/placebo arm, or a standard therapy, or to determine whether an experimental treatment is more effective than a standard therapy having lesser morbidity. [Source: Encyclopedia of Medical Decision Making; Randomized Clinical Trials]
broader: measurement, data sources and coding, and research methods
broader: controlled clinical trials
broader: biostatistics and clinical epidemiology
type: Concept

measurement, data sources and coding, and research methods
type: Concept
narrower: randomized clinical trials

concepts
type: Collection
type: ConceptGroup
member: randomized clinical trials