Understand trials
Types of Clinical Study
Whether participants are given a treatment by the study, followed as they are, or offered an investigational treatment outside a trial.
Interventional
Participants receive a treatment, device or other intervention assigned by the study, so its effects can be measured.
73,554 open of 464,253
Observational
Researchers follow people and record outcomes without assigning a treatment: cohorts, registries, case-control studies.
26,786 open of 142,101
Expanded access
Programmes that give patients outside a trial an investigational treatment, usually when no comparable option exists.
0 open of 1,073