What are the types of clinical trials for participants with current medical conditions?
For participants with specific illnesses or medical conditions there are two major types of clinical trials: • Interventional: During this type of trial, you are given a specific treatment defined by the protocol, and the results are measured by investigators. The investigators in interventional studies take an active role by administering a drug or a medical device and measuring its effects. • Observational: In this type of trial, you are not given any specific treatment; but you are observed by the site staff and any changes in your medical condition are closely monitored. The results of this trial are measured by investigators. In observational studies, the investigators take a passive role, only observing associations between volunteers’ current treatments and their health status. No treatments are administered related to the trial.
