Experimental and observational studies

Clinical research can be broadly classified into experimental studies and observational studies.

So what are the differences between observational studies and experimental studies?

  • Observational studies
    This is where the exposure of a subject occurs naturally and is 'observed' or recorded by the epidemiologist.
  • Experimental studies
    In an experimental study (intervention study) the exposure is 'assigned' to the patient by the investigator.
Watch the video below to learn about experimental and observational studies.