A clinical trial involves researching human participants and is intended to add to medical knowledge. Most clinical trials fall into two types of study:
For interventional studies, participants receive specific interventions according to the research plan or protocol developed by the investigators. Interventions may be medical protocols (like drugs or devices) changes to behavior, changes to diet, or a medical procedure.
Results from the intervention group are then compared against a placebo or control group to gauge the interventions safety and efficacy.
There are not stringent guidelines when determining what criteria make a clinical trial justified. So the team responsible for the study created their own, very simple criteria:
The researchers applied the about criteria to more than 200 clinical trial and found that only 44% of the clinical trials met all three criteria.
Results for the individual criterion were as follows:
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