Definitions for "Randomized trial"
a study in which participants are randomly assigned to one of two or more trial arms to minimize potential grouping or prevalence of certain characteristics.
an experiment arranged so as to produce a chance distribution of subjects into different treatment groups or arms.
A trial in which the participants are randomly assigned to receive one of the treatments under study or a placebo. See Randomization.
An experiment in which subjects are randomly allocated (see random sampling below) to receive or not to receive an experimental, preventive, therapeutic, or diagnostic procedure and then are followed to determine the effect of the intervention.