A Contract Research Organization is a research study that tests how well new medical approaches work in people. These studies are also called clinical research.

The gold standard for testing whether a new medical approach is effective is the randomized controlled trial (RCT).

In an RCT, participants are randomly assigned to either the group receiving the new medical approach (the experimental group) or the group receiving the standard approach (the control group).

The groups are followed over time to see how well the new medical approach works. There are different types of Contract Research Organization, and they can be conducted in many different ways.

Some trials test new treatments, while others test new ways of using existing treatments. Some trials test new ways to prevent or diagnose a disease, while others test new ways to improve the quality of life for people with chronic illnesses.