Principal investigator
The doctor or researcher responsible for running the study at a site.
Learning
What it means
The principal investigator is the person in charge of conducting the study at a particular location, and is responsible for participant safety and protocol adherence there.
Why it matters if you take part
They or their study coordinator are who you would deal with directly. A study at many hospitals has a principal investigator at each.
Related terms
This explains how clinical research works. It is not medical advice and does not describe any specific condition or treatment. Only a trial site can determine whether someone can take part in a study.