ABSTRACT
A randomized concurrently controlled clinical trial is simply an experiment performed on human subjects to assess the efficacy of a new treatment for some condition. It has two key features, which in the simplest case are as follows:
1. The new treatment is given to a group of patients (called the
treated group
) and another treatment, often the one most widely used, is given to another group of patients at the same time — this is usually called the
control group
. This is what makes the trial concurrently controlled.
