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.