Question

what are types of clinical trial

Answer 1

Clinical trials can be categorised according to their objectives and also the way they are organised. For example, they might be prevention trials, treatment trials or diagnostic and screening trials.

Answer 2

~ Treatment Trials test new treatments, new combinations of drugs, or new approaches to surgery or radiation therapy.
~Prevention Trials look for better ways to prevent a given disease in people who have never had that disease or to prevent a disease from returning. Preventative approaches include medicines, vitamins, vaccines, minerals, and lifestyle changes.
~Diagnostic Trials are conducted to find better tests or procedures for diagnosing a particular disease or condition.
~Screening Trials test the best way to detect certain diseases or health conditions.
~Quality of Life Trials (or supportive care trials) explore ways to improve comfort and the quality of life for individuals with a chronic illness.