These are the factors that participants in a clinical trial or other medical study must have in order to enroll in the trial. If the trial is testing a therapeutic intervention, the inclusion criteria will include whatever condition the intervention is intended to treat and will usually include a definition or list of disease characteristics or severity that participants must meet. For example, people in a breast cancer trial may need to have a specific type of breast cancer and have already received two prior lines of therapy, or to be at a specific stage in their cancer.
