Definition: Control is a standard against which experimental observations may be evaluated. In clinical trials, one group of participants is given an experimental drug, while another group (i.e., the control group) is given either a standard treatment for the disease or a placebo.
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Source:
ClinicalTrials.gov
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Source:
ClinicalTrials.gov
Examples: In controlled trials, the control group is sometimes made up of healthy people who do not need the drug being tested.
